Details of the Researcher

PHOTO

Go Yusa
Section
Graduate School of Science
Job title
Professor
Degree

Committee Memberships 2

  • 日本物理学会　世話人

    2007/11 - 2008/10

  • 日本物理学会　世話人

    2007/11 - 2008/10

Professional Memberships 3

  • 日本物理学会

  • 応用物理学会

  • American Physical Society

Research Interests 7

  • Extreme Universe

  • Microwave

  • Quantum Information

  • Nuclear magnetic resonance

  • Optical Physics

  • Quantum Universe

  • Seminconductor Nanostructure

Research Areas 7

  • Nanotechnology/Materials / Nano/micro-systems /

  • Nanotechnology/Materials / Thin-film surfaces and interfaces /

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Electronic devices and equipment /

  • Natural sciences / Particle, nuclear, cosmic-ray, and astrophysics - experiment /

  • Nanotechnology/Materials / Nanomaterials /

  • Nanotechnology/Materials / Nanostructure physics /

  • Natural sciences / Semiconductors, optical and atomic physics /

Papers 66

  1. Spatiotemporal imaging of gate-controlled multipath dynamics of fractional quantum Hall edge excitations

    Yunhyeon Jeong, Akinori Kamiyama, John N. Moore, Takaaki Mano, Ken-ichi Sasaki, Yuuki Sugiyama, Tokiro Numasawa, Masahiro Hotta, Go Yusa

    2026/03/31

    More details Close

    Quantum Hall edge excitations, whose low-energy behavior admits a chiral conformal-field-theory description, are a promising platform for engineered dynamical experiments, including analog-spacetime proposals. However, establishing their edge dynamics in realistic electrostatic landscapes is essential for controlled dynamical experiments and has remained experimentally challenging. Here we report spatiotemporal imaging of gate-controlled multipath dynamics of edge excitations in a $ν= 1/3$ fractional quantum Hall device using stroboscopic time-resolved photoluminescence microscopy and spectroscopy with $\sim$100-ps resolution. By tuning a control-gate-defined potential landscape, we observe switching between mesa-defined and gate-defined trajectories and identify an intermediate regime in which a single launched excitation accesses multiple pathways. Time-resolved measurements at downstream locations reveal gate-dependent arrival times and pronounced temporal broadening, showing that the propagation dynamics are strongly modified by the local confinement and become increasingly dispersive in a multipath landscape. We further observe a long-range transverse optical response extending tens of micrometers into the bulk and persisting over distances exceeding 200 $μ$m downstream, consistent with the near-field component of an edge magnetoplasmon. These results establish direct experimental access to controllable multipath edge dynamics in the fractional quantum Hall regime and suggest a platform for engineered nonequilibrium and interference-based experiments, as well as future analog-spacetime studies in quantum Hall edge systems.

  2. Switching the persistent spin helix's orientation in gate-controlled GaAs double quantum wells

    S. Chander, B. W. Grobecker, A. V. Poshakinskiy, S. Anghel, T. Mano, J. N. Moore, G. Yusa, M. Betz

    PHYSICAL REVIEW APPLIED　25　(3)　2026/03/19

    DOI： 10.1103/m4cv-6cyt 　

    ISSN： 2331-7019

  3. Electrically Induced Bulk and Edge Excitations in the Fractional Quantum Hall Regime

    Quentin France, Yunhyeon Jeong, Akinori Kamiyama, Takaaki Mano, Ken-ichi Sasaki, Masahiro Hotta, Go Yusa

    Physical Review Letters　135　(6)　2025/08/05

    DOI： 10.1103/4bp5-9ryg 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  4. Enhancing spin diffusion in GaAs quantum wells: The role of electron density and channel width

    B. W. Grobecker, A. V. Poshakinskiy, S. Anghel, T. Mano, G. Yusa, M. Betz

    Journal of Applied Physics　137　(18)　2025/05/08

    DOI： 10.1063/5.0257898 　

    ISSN： 0021-8979

    eISSN： 1089-7550

  5. Dynamics of the fractional quantum Hall edge probed by stroboscope measurements of trions

    Akinori Kamiyama, Masahiro Matsuura, John N. Moore, Takaaki Mano, Naokazu Shibata, Go Yusa

    APPLIED PHYSICS LETTERS　122　(20)　2023/05

    DOI： 10.1063/5.0138332 　

    ISSN： 0003-6951

    eISSN： 1077-3118

  6. Thermal transport imaging in the quantum Hall edge channel

    J. N. Moore, A. Kamiyama, T. Mano, G. Yusa

    EPL　142　(1)　2023/04

    DOI： 10.1209/0295-5075/acc7c3 　

    ISSN： 0295-5075

    eISSN： 1286-4854

  7. 量子ホール系に量子宇宙を再現する Invited Peer-reviewed

    OYO BUTURI　92　(2)　112-115　2023/02

    DOI： 10.11470/oubutsu.92.2_112 　

  8. Spin helices in GaAs quantum wells: Interplay of electron density, spin diffusion, and spin lifetime

    S. Anghel, A. V. Poshakinskiy, K. Schiller, G. Yusa, T. Mano, T. Noda, M. Betz

    Journal of Applied Physics　132　(5)　2022/08/07

    DOI： 10.1063/5.0097426 　

    ISSN： 0021-8979

    eISSN： 1089-7550

  9. Expanding edges of quantum Hall systems in a cosmology language: Hawking radiation from de Sitter horizon in edge modes Peer-reviewed

    Masahiro Hotta, Yasusada Nambu, Yuuki Sugiyama, Kazuhiro Yamamoto, Go Yusa

    PHYSICAL REVIEW D　105　(10)　2022/05

    DOI： 10.1103/PhysRevD.105.105009 　

    ISSN： 2470-0010

    eISSN： 2470-0029

  10. Real-time and space visualization of excitations of the ν=1/3 fractional quantum Hall edge Peer-reviewed

    Akinori Kamiyama, Masahiro Matsuura, John N. Moore, Takaaki Mano, Naokazu Shibata, Go Yusa

    Physical Review Research　4　(1)　2022/03/28

    DOI： 10.1103/PhysRevResearch.4.L012040 　

    eISSN： 2643-1564

  11. Anisotropic expansion of drifting spin helices in GaAs quantum wells Peer-reviewed

    S. Anghel, A. V. Poshakinskiy, K. Schiller, F. Passmann, C. Ruppert, S. A. Tarasenko, G. Yusa, T. Mano, T. Noda, M. Betz

    Physical Review B　103　(3)　035429　2021/01/25

    DOI： 10.1103/PhysRevB.103.035429 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  12. Spin-locked transport in a two-dimensional electron gas Peer-reviewed

    Anghel, S., Passmann, F., Schiller, K.J., Moore, J.N., Yusa, G., Mano, T., Noda, T., Betz, M., Bristow, A.D.

    Physical Review B　101　(15)　2020/04/15

    DOI： 10.1103/PhysRevB.101.155414 　

    ISSN： 2469-9969 2469-9950

    eISSN： 2469-9969

  13. Analyzing oxygen and silicon incorporation in GaN microstructures composed of c-planes and angled facets by confocal magneto-photoluminescence microscopy Peer-reviewed

    Akinori Kamiyama, Kazunobu Kojima, Shigefusa F. Chichibu, Go Yusa

    AIP Advances　10　(3)　035215-035215　2020/03/01

    DOI： 10.1063/1.5144549 　

    eISSN： 2158-3226

  14. Transport of a persistent spin helix drifting transverse to the spin texture Peer-reviewed

    F. Passmann, A. D. Bristow, J. N. Moore, G. Yusa, T. Mano, T. Noda, M. Betz, S. Anghel

    Physical Review B　99　(12)　125404-1-125404-6　2019/03/04

    DOI： 10.1103/PhysRevB.99.125404 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  15. Photoquantum Hall Effect and Light-Induced Charge Transfer at the Interface of Graphene/InSe Heterostructures Peer-reviewed

    Mahabub A. Bhuiyan, Zakhar R. Kudrynskyi, Debarati Mazumder, Jake D.G. Greener, Oleg Makarovsky, Christopher J. Mellor, Evgeny E. Vdovin, Benjamin A. Piot, Inna I. Lobanova, Zakhar D. Kovalyuk, Marina Nazarova, Artem Mishchenko, Kostya S. Novoselov, Yang Cao, Laurence Eaves, Go Yusa, Amalia Patanè

    Advanced Functional Materials　29　(3)　2019/01/17

    DOI： 10.1002/adfm.201805491 　

    ISSN： 1616-301X

    eISSN： 1616-3028

  16. Evidence for a correlated phase of skyrmions observed in real space Peer-reviewed

    John N. Moore, Hikaru Iwata, Junichiro Hayakawa, Takaaki Mano, Takeshi Noda, Naokazu Shibata, Go Yusa

    Physical Review B　98　(16)　161402(R)-1-161402(R)-6　2018/10/08

    DOI： 10.1103/PhysRevB.98.161402 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  17. Field control of anisotropic spin transport and spin helix dynamics in a modulation-doped GaAs quantum well Peer-reviewed

    S. Anghel, F. Passmann, A. Singh, C. Ruppert, A. V. Poshakinskiy, S. A. Tarasenko, J. N. Moore, G. Yusa, T. Mano, T. Noda, X. Li, A. D. Bristow, M. Betz

    Physical Review B　97　(12)　125410-1-125410-10　2018/03/09

    DOI： 10.1103/PhysRevB.97.125410 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  18. Transmission and reflection of charge-density wave packets in a quantum Hall edge controlled by a metal gate Peer-reviewed

    Masahiro Matsuura, Takaaki Mano, Takeshi Noda, Naokazu Shibata, Masahiro Hotta, Go Yusa

    Applied Physics Letters　112　(6)　063104-1-063104-4　2018/02/05

    DOI： 10.1063/1.5009373 　

    ISSN： 0003-6951

    eISSN： 1077-3118

  19. Optically Imaged Striped Domains of Nonequilibrium Electronic and Nuclear Spins in a Fractional Quantum Hall Liquid Peer-reviewed

    John N. Moore, Junichiro Hayakawa, Takaaki Mano, Takeshi Noda, Go Yusa

    Physical Review Letters　118　(7)　075802-1-075802-5　2017/02/17

    DOI： 10.1103/PhysRevLett.118.076802 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  20. The direct-to-indirect band gap crossover in two-dimensional van der Waals Indium Selenide crystals Peer-reviewed

    G. W. Mudd, M. R. Molas, X. Chen, V. Zólyomi, K. Nogajewski, Z. R. Kudrynskyi, Z. D. Kovalyuk, G. Yusa, O. Makarovsky, L. Eaves, M. Potemski, V. I. Fal'Ko, A. Patanè

    Scientific Reports　6　39619-1-39619-10　2016/12/23

    DOI： 10.1038/srep39619 　

    ISSN： 2045-2322

    eISSN： 2045-2322

  21. Hyperfine-controlled domain-wall motion observed in real space and time Peer-reviewed

    John N. Moore, Junichiro Hayakawa, Takaaki Mano, Takeshi Noda, Go Yusa

    Physical Review B　94　(20)　201408(R)-1-201408(R)-5　2016/11/15

    DOI： 10.1103/PhysRevB.94.201408 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  22. Enhanced spin-polarization lifetimes in a two-dimensional electron gas in a gate-controlled GaAs quantum well Peer-reviewed

    Sergiu Anghel, Akshay Singh, Felix Passmann, Hikaru Iwata, John N. Moore, Go Yusa, Xiaoqin Li, Markus Betz

    Physical Review B　94　(3)　035303-1-035303-6　2016/07/18

    DOI： 10.1103/PhysRevB.94.035303 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  23. 22pAG-6 Real-time dynamics of a topologically-protected excitation of the fractional quantum Hall effect studied by photoluminescence microscopy

    Moore J. N., Hayakawa J., Mano T., Noda T., Yusa G.

    Meeting Abstracts of the Physical Society of Japan　71　1426-1426　2016

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.71.1.0_1426 　

    ISSN： 2189-079X

  24. 19aAE-3 A new topological state of the fractional quantum Hall effect imaged by spinsensitive photoluminescence microscopy

    Moore J. N., Hayakawa J., Mano T., Noda T., Yusa G.

    Meeting Abstracts of the Physical Society of Japan　70　1130-1130　2015

    Publisher: The Physical Society of Japan (JPS)

    DOI： 10.11316/jpsgaiyo.70.2.0_1130 　

    ISSN： 2189-079X

  25. Quantum state tomography of large nuclear spins in a semiconductor quantum well: Optimal robustness against errors as quantified by condition numbers

    Adam Miranowicz, Sahin K. Ozdemir, Jiri Bajer, Go Yusa, Nobuyuki Imoto, Yoshiro Hirayama, Franco Nori

    PHYSICAL REVIEW B　92　(7)　075312-1-075312-18　2014/10/09

    DOI： 10.1103/PhysRevB.92.075312 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  26. Real-space observation of quantum Hall effect using exciton microscopy Invited Peer-reviewed

    Go Yusa

    Journal of Vacuum Society of Japan　9　(9)　317-323　2014/09

    DOI： 10.3131/jvsj2.57.317 　

    ISSN： 1882-2398

  27. 量子エネルギーテレポーテーション Invited Peer-reviewed

    堀田昌寛, 遊佐剛

    日本物理学会誌　9　613-622　2014/09

  28. Quantum energy teleportation without a limit of distance Peer-reviewed

    Masahiro Hotta, Jiro Matsumoto, Go Yusa

    Physical Review A - Atomic, Molecular, and Optical Physics　89　(1)　012311-1-012311-6　2014/01/13

    DOI： 10.1103/PhysRevA.89.012311 　

    ISSN： 1050-2947

    eISSN： 1094-1622

  29. Real-space imaging of fractional quantum Hall liquids Peer-reviewed

    Junichiro Hayakawa, Koji Muraki, Go Yusa

    Nature Nanotechnology　8　(1)　31-35　2013/01

    DOI： 10.1038/nnano.2012.209 　

    ISSN： 1748-3387

    eISSN： 1748-3395

  30. Quantum energy teleportation in a quantum Hall system Peer-reviewed

    Go Yusa, Wataru Izumida, Masahiro Hotta

    Physical Review A - Atomic, Molecular, and Optical Physics　84　(3)　2011/09/26

    DOI： 10.1103/PhysRevA.84.032336 　

    ISSN： 1050-2947

    eISSN： 1094-1622

  31. Passivity breaking of a local vacuum state in a quantum Hall system

    Go Yusa, Wataru Izumida, Masahiro Hotta

    Quantum Physics　1101　2766v1-1-2766v1-4　2011/01/14

    More details Close

    We propose an experimental method for extracting the zero-point energy from a local vacuum state by performing local operations and classical communication (LOCC). We model a quantum Hall edge channel as a quantum entangled many-body channel and the zero-point fluctuation in the charge density of the channel as the vacuum state. We estimate the order of the energy gain using reasonable experimental parameters. Such a quantum feedback system breaks the passivity of a local vacuum state. It can be used to demonstrate Maxwell's demon or quantum energy teleportation in which no physical entity transports energy.

  32. Imaging of multinuclear spin system (I>1/2) in semiconductor microstructures using longitudinal-magnetization-detection nuclear magnetic resonance Peer-reviewed

    Takashi Kawamura, Go Yusa

    Applied Physics Letters　97　(11)　112108-1-112108-3　2010/09/13

    DOI： 10.1063/1.3490673 　

    ISSN： 0003-6951

  33. Electron-spin/nuclear-spin interactions and NMR in semiconductors Peer-reviewed

    Y. Hirayama, G. Yusa, K. Hashimoto, N. Kumada, T. Ota, K. Muraki

    Semiconductor Science and Technology　24　(2)　2009

    DOI： 10.1088/0268-1242/24/2/023001 　

    ISSN： 0268-1242

    eISSN： 1361-6641

  34. Coherence time of nuclear spins in GaAs quantum well probed by submicron-scale all-electrical nuclear magnetic resonance device Peer-reviewed

    Takeshi Ota, Norio Kumada, Go Yusa, Sen Miyashita, Toshimasa Fujisawa, Yoshiro Hirayama

    Japanese Journal of Applied Physics　47　(4 PART 2)　3115-3117　2008/04

    DOI： 10.1143/JJAP.47.3115 　

    ISSN： 0021-4922

    eISSN： 1347-4065

  35. Initialization and logic gate operations of nuclear spin qubits using a submicron scale resistively-detected NMR device Peer-reviewed

    T. Ota, G. Yusa, N. Kumada, S. Miyashita, T. Fujisawa, Y. Hirayama

    Physica Status Solidi (C) Current Topics in Solid State Physics　5　(1)　306-309　2008

    DOI： 10.1002/pssc.200776540 　

    ISSN： 1862-6351

  36. Nuclear spin manipulation in semiconductor nanostructures Peer-reviewed

    Koji Muraki, Go Yusa, Yoshiro Hirayama

    Proceedings of SPIE - The International Society for Optical Engineering　6800　H8000　2008

    DOI： 10.1117/12.767747 　

    ISSN： 0277-786X

    eISSN： 1996-756X

  37. Cooling of radiative quantum-dot excitons by terahertz radiation: A spin-resolved Monte Carlo carrier dynamics model Peer-reviewed

    Fredrik Boxberg, Jukka Tulkki, Go Yusa, Hiroyuki Sakaki

    Physical Review B - Condensed Matter and Materials Physics　75　(11)　115334　2007/03/30

    DOI： 10.1103/PhysRevB.75.115334 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  38. Study of nuclear quadrupolar interaction using a novel all-electrical GaAs NMR device Peer-reviewed

    T. Ota, N. Kumada, G. Yusa, S. Miyashita, Y. Hirayama

    Physica Status Solidi (C) Current Topics in Solid State Physics　4　(5)　1759-1762　2007

    DOI： 10.1002/pssc.200674281 　

    ISSN： 1862-6351

  39. Nuclear spin population and its control toward initialization using an all-electrical submicron scale nuclear magnetic resonance device Peer-reviewed

    T. Ota, G. Yusa, N. Kumada, S. Miyashita, Y. Hirayama

    Applied Physics Letters　90　(10)　102118　2007

    DOI： 10.1063/1.2711520 　

    ISSN： 0003-6951

    eISSN： 1077-3118

  40. Decoherence of nuclear spins due to dipole-dipole interactions probed by resistively detected nuclear magnetic resonance Peer-reviewed

    T. Ota, G. Yusa, N. Kumada, S. Miyashita, T. Fujisawa, Y. Hirayama

    Applied Physics Letters　91　(19)　193101　2007

    DOI： 10.1063/1.2804011 　

    ISSN： 0003-6951

  41. Cooling of radiative quantum dot excitons by THz-radiation Peer-reviewed

    Fredrik Boxberg, Jukka Tulkki, Go Yusa, Hiroyuki Sakaki

    AIP Conference Proceedings　893　999-1000　2007

    DOI： 10.1063/1.2730232 　

    ISSN： 0094-243X

    eISSN： 1551-7616

  42. Electron spin and nuclear spin manipulation in semiconductor nanosystems Peer-reviewed

    Yoshiro Hirayama, Go Yusa, Satoshi Sasaki

    Physica Status Solidi (B) Basic Research　243　(14)　3764-3772　2006/11

    DOI： 10.1002/pssb.200642259 　

    ISSN： 0370-1972

    eISSN： 1521-3951

  43. Nanometre-scale nuclear-spin device for quantum information processing Peer-reviewed

    Y. Hirayama, A. Miranowicz, T. Ota, G. Yusa, K. Muraki, S. K. Ozdemir, N. Imoto

    Journal of Physics Condensed Matter　18　(21)　S885-S900　2006/05/31

    DOI： 10.1088/0953-8984/18/21/S13 　

    ISSN： 0953-8984

    eISSN： 1361-648X

  44. Self-sustaining resistance oscillations by electron-nuclear spin coupling in mesoscopic quantum hall systems Peer-reviewed

    G. Yusa, K. Hashimoto, K. Muraki, T. Saku, Y. Hirayama

    AIP Conference Proceedings　772　1341-1342　2005/06/30

    DOI： 10.1063/1.1994608 　

    ISSN： 0094-243X

    eISSN： 1551-7616

  45. Resistance oscillations by electron-nuclear spin coupling in microscopic quantum hall devices Peer-reviewed

    Go Yusa, Katsushi Hashimoto, Koji Muraki, Tadashi Saku, Yoshiro Hirayama

    Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers　44　(4 B)　2669-2671　2005/04

    DOI： 10.1143/JJAP.44.2669 　

    ISSN： 0021-4922

  46. Controlled multiple quantum coherence of nuclear spins in a nanometre-scale device Peer-reviewed

    Go Yusa, Koji Muraki, Kel Takashina, Katsushi Hashimoto, Yoshiro Hirayama

    Nature　434　(7036)　1001-1005　2005/04

    DOI： 10.1038/nature03456 　

    ISSN： 0028-0836

    eISSN： 1476-4687

  47. Self-sustaining resistance oscillations: Electron-nuclear spin coupling in mesoscopic quantum Hall devices Peer-reviewed

    G Yusa, K Hashimoto, K Muraki, T Saku, Y Hirayama

    PHYSICAL REVIEW B　69　(16)　2004/04

    DOI： 10.1103/PhysRevB.69.161302 　

    ISSN： 1098-0121

    eISSN： 2469-9969

  48. Intralayer backscattering in narrow GaAs/AlxGa1-xAs/GaAs bilayer channels - art. no. 085323

    G Yusa, K Muraki, T Saku, Y Hirayama

    PHYSICAL REVIEW B　69　(8)　2004/02

    DOI： 10.1103/PhysRevB.69.085323 　

    ISSN： 2469-9950

    eISSN： 2469-9969

  49. Intralayer backscattering in narrow GaAs/Al<inf>x</inf>Ga<inf>1-x</inf>As/GaAs bilayer channels Peer-reviewed

    G. Yusa, K. Muraki, T. Saku, Y. Hirayama

    Physical Review B - Condensed Matter and Materials Physics　69　(8)　2004

    DOI： 10.1103/PhysRevB.69.085323 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  50. Charged excitons at high magnetic fields: The effect of the surrounding electron gas Peer-reviewed

    I. Bar-Joseph, G. Yusa, H. Shtrikman

    Solid State Communications　127　(12 SPEC.)　765-770　2003/09

    DOI： 10.1016/S0038-1098(03)00570-2 　

    ISSN： 0038-1098

  51. Photoluminescence in the fractional quantum Hall regime Peer-reviewed

    G. Yusa, H. Shtrikman, I. Bar-Joseph

    Physica E: Low-Dimensional Systems and Nanostructures　12　(1-4)　49-54　2002/01

    DOI： 10.1016/S1386-9477(01)00259-4 　

    ISSN： 1386-9477

  52. Charged excitons in the fractional quantum hall regime Peer-reviewed

    G. Yusa, H. Shtrikman, I. Bar-Joseph

    Physical Review Letters　87　(21)　216402-1　2001/11/19

    DOI： 10.1103/PhysRevLett.87.216402 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  53. Scattering of 2D electrons by self-organized anti-dots in n-AlGaAs/GaAs heterojunction channels Peer-reviewed

    T. Kawazu, T. Noda, H. Kim, J. Irisawa, T. Yamabana, G. Yusa, C. Metzener, H. Sakaki

    Physica Status Solidi (B) Basic Research　224　(3)　707-710　2001/04

    DOI： 10.1002/(SICI)1521-3951(200104)224:3<707::AID-PSSB707>3.0.CO;2-H 　

    ISSN： 0370-1972

  54. Control of electron storage and memory characteristics of single and stacked InAs quantum dot layers embedded in GaAs/n-AlGaAs FET structures Peer-reviewed

    H Kim, T Noda, G Yusa, T Kawazu, H Sakaki

    PROCEEDINGS OF THE 25TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, PTS I AND II　87　1805-1806　2001

    ISSN： 0930-8989

  55. From excitons to Fermi edge singularity Peer-reviewed

    G Yusa, H Shtrikman, Bar-Joseph, I

    PROCEEDINGS OF THE 25TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, PTS I AND II　87　501-502　2001

    ISSN： 0930-8989

  56. Onset of exciton absorption in modulation-doped GaAs quantum wells Peer-reviewed

    G Yusa, H Shtrikman, Bar-Joseph, I

    PHYSICAL REVIEW B　62　(23)　15390-15393　2000/12

    DOI： 10.1103/PhysRevB.62.15390 　

    ISSN： 1098-0121

    eISSN： 1550-235X

  57. Modelling inter-dot Coulomb interaction effects in field effect transistors with an embedded quantum dot layer Peer-reviewed

    C. Metzner, G. Yusa, H. Sakaki

    Superlattices and Microstructures　25　(3)　537-549　1999/03

    DOI： 10.1006/spmi.1996.0228 　

    ISSN： 0749-6036

  58. InAs quantum dot field effect transistors Peer-reviewed

    G. Yusa, H. Sakaki

    Superlattices and Microstructures　25　(1-2)　247-250　1999/01

    DOI： 10.1006/spmi.1998.0688 　

    ISSN： 0749-6036

  59. Trapping of a single photogenerated hole by an InAs quantum dot in GaAs/n-AlGaAs quantum trap FET and its spectral response in the near-infrared regime Peer-reviewed

    G. Yusa, H. Sakaki

    Physica E: Low-Dimensional Systems and Nanostructures　2　(1-4)　734-737　1998/07/15

    DOI： 10.1016/S1386-9477(98)00150-7 　

    ISSN： 1386-9477

  60. MBE growth of novel GaAs/n-AlGaAs field-effect transistor structures with embedded InAs quantum traps and their transport characteristics Peer-reviewed

    G. Yusa, H. Sakaki

    Journal of Crystal Growth　175-176　(PART 2)　730-735　1997/05

    DOI： 10.1016/S0022-0248(96)00927-X 　

    ISSN： 0022-0248

  61. Trapping of photogenerated carriers by InAs quantum dots and persistent photoconductivity in novel GaAs/n-AlGaAs field-effect transistor structures Peer-reviewed

    G. Yusa, H. Sakaki

    Applied Physics Letters　70　(3)　345-347　1997/01/20

    DOI： 10.1063/1.119068 　

    ISSN： 0003-6951

  62. Resonant tunneling of electrons via 20 nm scale InAs quantum dot and magnetotunneling spectroscopy of its electronic states Peer-reviewed

    M Narihiro, G Yusa, Y Nakamura, T Noda, H Sakaki

    APPLIED PHYSICS LETTERS　70　(1)　105-107　1997/01

    DOI： 10.1063/1.119276 　

    ISSN： 0003-6951

  63. GaAs/n-AlGaAs field-effect transistor with embedded InAs quantum traps and its programmable threshold characteristics Peer-reviewed

    G. Yusa, H. Sakaki

    Electronics Letters　32　(5)　491-493　1996/02/29

    DOI： 10.1049/el:19960293 　

    ISSN： 0013-5194

  64. Nanometer-scale GaAs dot structures fabricated using in-situ gas etching technique with InAs dots as mask Peer-reviewed

    G Yusa, H Noge, Y Kadoya, T Someya, T Suga, P Petroff, H Sakaki

    COMPOUND SEMICONDUCTORS 1995　145　955-960　1996

    ISSN： 0951-3248

  65. Fabrication of 10-Nanometer-Scale Gaas Dot Structures by in sItu Selective Gas Etching with Self-Assembled Inas Dots as a Mask Peer-reviewed

    Go Yusa, Hiroshi Noge, Yutaka Kadoya, Takao Someya, Tadatomo Suga, Pierre Petroff, Hiroyuki Sakaki

    Japanese Journal of Applied Physics　34　(9)　L1198-L1201　1995/09

    DOI： 10.1143/JJAP.34.L1198 　

    ISSN： 0021-4922

    eISSN： 1347-4065

  66. Transport properties of two-dimensional electron gas in AlGaAs/GaAs selectively doped heterojunctions with embedded InAs quantum dots Peer-reviewed

    H. Sakaki, G. Yusa, T. Someya, Y. Ohno, T. Noda, H. Akiyama, Y. Kadoya, H. Noge

    Applied Physics Letters　67　(23)　3444-3446　1995

    DOI： 10.1063/1.115274 　

    ISSN： 0003-6951

Show all ︎Show first 5

Misc. 68

  1. Electrically induced bulk and edge excitations in the fractional quantum Hall regime

    Quentin France, Yunhyeon Jeong, Akinori Kamiyama, Takaaki Mano, Ken-ichi Sasaki, Masahiro Hotta, Go Yusa

    2025/02/03

    More details Close

    We apply a voltage pulse to electrically excite the incompressible region of a two-dimensional electron liquid in the $\nu=2/3$ fractional quantum Hall state and investigate the collective excitations in both the edge and bulk via photoluminescence spectral energy shifts. Introducing an offset in the voltage pulse significantly enhances the excitation signal. Real-space and time-resolved measurements reveal the dynamics of the bulk excitations, with an estimated group velocity of approximately $3 \times 10^4$ m/s. These bulk excitations align well with the magneto-plasmon model. Our results highlight the topological link between edge and bulk states, providing a novel approach to exploring solid-state analogs of quantum gravity.

  2. Enhancing Spin Diffusion in GaAs Quantum Wells: The Role of Electron Density and Channel Width

    B. W. Grobecker, A. V. Poshakinskiy, S. Anghel, T. Mano, G. Yusa, M. Betz

    2025/01/14

    More details Close

    This study explores the relationship between spin diffusion, spin lifetime, electron density and lateral spatial confinement in two-dimensional electron gases hosted in GaAs quantum wells. Using time-resolved magneto-optical Kerr effect microscopy, we analyze how Hall-bar channel width and back-gate voltage modulation influence spin dynamics. The results reveal that the spin diffusion coefficient increases with reduced channel widths, a trend further amplified at lower electron concentrations achieved via back-gate voltages, where it increases up to 150% for the narrowest channels. The developed theoretical model confirms the spatial inhomogeneities in the spin diffusion as arising from electron-density variations within the channels. The results underscore the importance of tuning electron density and spatial geometry to optimize spin transport and coherence, providing valuable design considerations for spintronic devices where efficient spin manipulation is crucial.

  3. Real-time and real-space observation of edge magnetoplasmon

    神山晃範, 松浦雅広, MOORE John N., 間野高明, 遊佐剛, 遊佐剛

    日本物理学会講演概要集(CD-ROM)　76　(2)　2021

    ISSN： 2189-079X

  4. Real-space-time observation of fractional quantum Hall edge state

    神山晃範, 松浦雅広, MOORE John N., 間野高明, 野田武司, 遊佐剛, 遊佐剛

    日本物理学会講演概要集(CD-ROM)　75　(2)　2020

    ISSN： 2189-079X

  5. 時間分解顕微分光法を用いた量子ホール系における荷電励起子ダイナミクスの研究

    松浦雅広, 神山晃範, MOORE John, 間野高明, 野田武司, 遊佐剛, 遊佐剛

    日本物理学会講演概要集(CD-ROM)　74　(2)　2019

    ISSN： 2189-079X

  6. 光検出MRI法によるナノスケールイメージングの物性物理への展開

    遊佐剛

    旭硝子財団研究助成成果発表会　2018　2018

  7. Nanoscale imaging by optically detected MRI applied to solid state physics

    遊佐剛

    旭硝子財団助成成果報告書(Web)　2018　2018

  8. 空間・時間分解PLを用いたGaNの局所励起子応答

    神山晃範, 小島一信, 遊佐剛, 秩父重英

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　79th　2018

    ISSN： 2436-7613

  9. 原子層物質InSeの顕微光学特性

    柏木一成, PATANE Amalia, 遊佐剛, BHUIYAN Mahabub, KUDRYNSKYI Zakhar

    日本物理学会講演概要集(CD-ROM)　72　(1)　2017

    ISSN： 2189-079X

  10. 量子ホールエッジにおける量子エネルギーテレポーテーションの試み

    松浦雅広, 野田武司, 間野高明, 柴田尚和, 堀田昌寛, 遊佐剛

    日本物理学会講演概要集(CD-ROM)　72　(2)　2017

    ISSN： 2189-079X

  11. 希釈磁性半導体InMnSeの基礎特性

    柏木一成, AMALIA Patene, 遊佐剛

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　78th　2017

    ISSN： 2436-7613

  12. Non-equilibrium fractional quantum Hall states visualized by optically detected MRI

    John N. Moore, Junichiro Hayakawa, Takaaki Mano, Takeshi Noda, Go Yusa

    2016/06/21

    DOI： 10.1103/PhysRevLett.118.076802 　

    More details Close

    Using photoluminescence microscopy enhanced by MRI, we visualize in real space both electron and nuclear polarization occurring in non-equilibrium FQH liquids. We observe stripe-like regions comprising FQH excited states which discretely form when the FQH liquid is excited by a source-drain current. These regions are topologically protected and deformable, and give rise to bidirectionally polarized nuclear spins as spin-resolved electrons flow across their boundaries.

  13. 偏光分光実空間マッピングによる分数量子ホール液体の相転移の解明

    遊佐剛

    日本物理学会講演概要集(CD-ROM)　70　(1)　2015

    ISSN： 2189-079X

  14. Quantum Energy Teleportation

    Hotta Masahiro, Yusa Go

    69　(9)　613-622　2014/09

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 0029-0181

    More details Close

    Nothingness is not empty in physics. It stands for the vacuum state of quantum fields with spatially entangled zero-point fluctuation. The vacuum entanglement allows for quantum protocols which attain energy transportation using only local operations and classical communication in an operational meaning. Thus the protocol is referred to as quantum energy teleportation (QET). QET is expected to be implemented by using quantum Hall edge currents. QET also sheds new light on the information loss problem of black hole evaporation.

  15. 28pPSA-6 Transport property of edge magnetoplasmon in quantum Hall system

    Yamaguchi K., Mano T., Noda T., Yusa G.

    Meeting abstracts of the Physical Society of Japan　69　(1)　714-714　2014/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  16. 荷電励起子でみる二次元電子系における核スピン偏極現象の空間観察

    遊佐剛

    日本物理学会講演概要集　68　(1)　2013

    ISSN： 1342-8349

  17. 高電界印加時の荷電励起誇子による半導体2次元電子系の実空間観察

    堀込康隆, 早川純一郎, 岩田晃, 遊佐剛

    日本物理学会講演概要集　68　(2)　2013

    ISSN： 1342-8349

  18. 27pCJ-8 Real-space imaging of fractional quantum Hall states

    Hayakawa J., Muraki K., Yusa G.

    Meeting abstracts of the Physical Society of Japan　67　(1)　760-760　2012/03/05

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  19. (111)面におけるCVDを用いたダイヤモンドの選択成長

    発地暁, 大倉佑介, 遊佐剛

    応用物理学会学術講演会講演予稿集(CD-ROM)　73rd　2012

  20. CVDによる(111)面ダイヤモンドの選択成長

    発地暁, 大倉佑介, 遊佐剛

    ダイヤモンドシンポジウム講演要旨集　26th　2012

  21. Quantum Hall systems and nuclear spin

    YUSA Go

    181　29-34　2011/12/07

    Publisher: 日本磁気学会

    ISSN： 1882-2940

  22. 25aHG-1 Micro-photoluminescence of the spin phase transition in the ν=2/3 fractional quantum Hall regime

    Hayakawa J., Muraki K., Yusa G.

    Meeting abstracts of the Physical Society of Japan　66　(1)　695-695　2011/03/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  23. 20pHV-5 Micro-photoluminescence around spin phase transition of v=2/3 fractional quantum Hall regime

    Hayakawa J., Muraki K., Yusa G.

    Meeting abstracts of the Physical Society of Japan　65　(1)　702-702　2010/03/01

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  24. 21pGV-2 Spectroscopy on trions and quantum Hall systems

    Yusa Go

    Meeting abstracts of the Physical Society of Japan　65　(1)　759-759　2010/03/01

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  25. 21pGV-2 Spectroscopy on trions and quantum Hall systems

    Yusa Go

    Meeting abstracts of the Physical Society of Japan　65　(1)　639-639　2010/03/01

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  26. トリオンと量子ホール系の分光

    遊佐剛

    日本物理学会講演概要集　65　(1)　2010

    ISSN： 1342-8349

  27. 半導体ナノ構造中の同核種および異核種スピン結合のコヒーレント制御

    遊佐剛

    村田学術振興財団年報　(24)　2010

    ISSN： 0919-3383

  28. 27pVE-13 Photoluminescence and transport simultaneous measurements of two-dimensional electron systems

    Hayakawa J., Kawamura T., Kuwano M., Onomitsu K., Fujisawa T., Yusa G.

    Meeting abstracts of the Physical Society of Japan　64　(1)　688-688　2009/03/03

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  29. 20pYK-9 Optical Measurement of Nuclear Spin Polarization at the Filling Factor v=2/3 Fractional Quantum Hall System

    Hayakawa J., Kawamura T., Rossander Lea Hildebrandt, Kuwano M., Onomitsu K., Miyashita S., Fujisawa T., Yusa G.

    Meeting abstracts of the Physical Society of Japan　63　(2)　598-598　2008/08/25

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  30. 23aQG-1 Local NMR on the Quantum Hall Regime

    Kawamura Takashi, Hayakawa Jun-ichiro, Onomitsu Koji, Miyashita Sen, Fujisawa Toshimasa, Yusa Go

    Meeting abstracts of the Physical Society of Japan　63　(2)　429-429　2008/08/25

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  31. 磁性スピンエレクトロニクスのアカデミックロードマップ

    岡林潤, 遊佐剛, 遊佐剛, 大島弘敬, 秋永広幸

    応用物理学関係連合講演会講演予稿集　55th　2008

  32. 量子ホール系と核スピン

    遊佐剛

    パリティ　23　(1)　2008/01

    Publisher: 丸善株式会社

    ISSN： 0911-4815

  33. Decoherence of nuclear spins in a GaAs quantum well probed by a submicron scale all-electrical NMR device

    OTA T., KUMADA N., YUSA G., MIYASHITA S., FUJISAWA T., HIRAYAMA Y.

    2007　1130-1131　2007/09/19

  34. 18pRC-2 Decoherence due to dipole interaction between nuclear spins probed by resistivelydetected NMR

    Ota T., Kumada N., Yusa G., Miyashita S., Fujisawa T., Hirayama Y.

    Meeting abstracts of the Physical Society of Japan　62　(1)　658-658　2007/02/28

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  35. Nuclear spins in a nanoscale device for quantum information processing

    Ş K. Özdemir, A. Miranowicz, T. Ota, G. Yusa, N. Imoto, Y. Hirayama

    e-Journal of Surface Science and Nanotechnology　4　669-673　2006/12/29

    DOI： 10.1380/ejssnt.2006.669 　

    ISSN： 1348-0391

    eISSN： 1348-0391

  36. 25pXL-4 Study of nuclear quadrupolar interaction using a all-electrical GaAs NMR device

    Ota T., Kumada N., Muraki K., Yusa G., Miyashita S., Hirayama Y.

    Meeting abstracts of the Physical Society of Japan　61　(2)　552-552　2006/08/18

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  37. 全電気的GaAs核スピン偏極デバイスにおける擬純粋状態の生成

    太田剛, 太田剛, 遊佐剛, 遊佐剛, 熊田倫雄, 村木康二, 宮下宣, 平山祥郎, 平山祥郎

    応用物理学関係連合講演会講演予稿集　53rd　(1)　2006

  38. Individual Mechanisms of Nuclear Spin Decoherence in a Nanoscale GaAs NMR Device

    Go Yusa, Norio Kumada, Koji Muraki, Yoshiro Hirayama

    2005/10/12

    More details Close

    We study decoherence of nuclear spins in a nanoscale GaAs device based on resistively detected nuclear magnetic resonance (NMR). We demonstrate how the spin echo technique can be modified for our system, and this is compared to the damping of Rabi-type coherent oscillations. By selectively decoupling nuclear-nuclear and electron-nuclear spin, we determine decoherence rates due to individual mechanisms, namely, direct or indirect dipole coupling between different or like nuclides and electron-nuclear spin coupling. The data reveal that the indirect dipole coupling between Ga and As mediated by conduction electrons has the strongest contribution, whereas the direct dipole coupling between them has the smallest, reflecting the magic angle condition between the As-Ga bonds and the applied magnetic field.

  39. 19pYC-10 Mechanism of Nuclear-Spin Decoherence in a GaAs Nanoscale Structure

    Yusa G., Kumada N., Muraki K., Hirayama Y.

    Meeting abstracts of the Physical Society of Japan　60　(2)　526-526　2005/08/19

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  40. 20aYC-3 NMR spectra in ν=2/3 fractional quantum Hall regime using GaAs nano-device

    Ota T., Yusa G., Muraki K., Kumada N., Miyashita S., Hirayama Y.

    Meeting abstracts of the Physical Society of Japan　60　(2)　531-531　2005/08/19

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  41. 25pZC-6 Nuclear spin manipulation in quantum Hall systems

    Hirayama Y., Yusa G., Muraki K.

    Meeting abstracts of the Physical Society of Japan　60　(1)　649-649　2005/03/04

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  42. Resistance Oscillations by Electron-Nuclear Spin Coupling in Microscopic Quantum Hall Devices

    YUSA Go, HASHIMOTO Katsushi, MURAKI Koji, SAKU Tadashi, HIRAYAMA Yoshiro

    2004　888-889　2004/09/15

  43. 13aYB-12 Coherent control of electron-nuclear spin coupling in nano-scale fractional quantum Hall devices

    Yusa G., Muraki K., Hashimoto K., Hirayama Y.

    Meeting abstracts of the Physical Society of Japan　59　(2)　598-598　2004/08/25

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  44. ナノスケールデバイスによる核スピンのコヒーレント制御

    遊佐剛, 村木康二, 橋本克之, 平山祥郎

    応用物理学会学術講演会講演予稿集　65th　(1)　2004

  45. Nuclear Spin Polarizations in Nanostructures

    Yusa G., Muraki K., Saku T., Hirayama Y.

    Meeting abstracts of the Physical Society of Japan　58　(2)　595-595　2003/08/15

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  46. Transport properties of coupled quantum wires in the magnetic filed

    Yusa G., Muraki K., Saku T., Hirayama Y.

    Meeting abstracts of the Physical Society of Japan　58　(1)　670-670　2003/03/06

    Publisher: The Physical Society of Japan (JPS)

    ISSN： 1342-8349

  47. 二重量子細線の作成と電気伝導特性

    遊佐剛, 宮下宣, 佐久規, 村木康二, 平山祥郎

    応用物理学会学術講演会講演予稿集　63rd　(3)　2002

  48. InGaAs量子ドット埋め込みヘテロ接合チャネルにおける局在効果

    川津琢也, 遊佐剛, 野田武司, 榊裕之

    応用物理学会学術講演会講演予稿集　63rd　(3)　2002

  49. InAs系量子ドット埋込みヘテロFET構造における電子蓄積とメモリ機能の制御

    KIM H., 野田武司, 遊佐剛, 川津琢也, 榊裕之

    応用物理学会学術講演会講演予稿集　61st　(3)　2000

  50. 自己形成ドットによる2次元電子の散乱と移動度

    川津琢也, 野田武司, 遊佐剛, 榊裕之, KIM H

    応用物理学会学術講演会講演予稿集　60th　(1)　1999

  51. 自己形成ドットによる2次元電子の散乱と移動度

    川津琢也, 野田武司, 遊佐剛, KIM H, 榊裕之

    応用物理学会学術講演会講演予稿集　60th　(3)　1999

  52. InAs量子ドットを埋め込んだポイントコンタクトの試作と伝導特性

    田中健一, 遊佐剛, 榊裕之

    応用物理学関係連合講演会講演予稿集　46th　(1)　1999

  53. InAs量子ドットFET構造における伝導特性およびメモリ効果の考察

    KIM H, 遊佐剛, 榊裕之

    応用物理学関係連合講演会講演予稿集　46th　(3)　1999

  54. InAs量子ドットを埋め込んだポイントコンタクトの試作と伝導特性

    田中健一, 遊佐剛, 榊裕之

    応用物理学関係連合講演会講演予稿集　46th　(3)　1999

  55. CV measurement on self-assembled InAs quantum dots.

    成広光, 神谷格, 小林靖之, 天内英隆, 近藤直樹, 遊佐剛, 榊裕之

    応用物理学関係連合講演会講演予稿集　45th　(3)　1998

  56. Memory function and single-electron effect in AlGaAs/GaAs FETs induced by Ga-FET implantation.

    KIM H, 野田武司, 遊佐剛, 榊裕之

    応用物理学会学術講演会講演予稿集　59th　(3)　1998

  57. Memory function and single-electron effect in AlGaAs/GaAs FETs induced by Ga-FET implantation.

    KIM H, 野田武司, 遊佐剛, 榊裕之

    応用物理学会学術講演会講演予稿集　59th　(1)　1998

  58. Capacitance measurement of resonant tunneling diode with buried InAs quantum dots.

    成広充, 遊佐剛, 榊裕之

    応用物理学会学術講演会講演予稿集　58th　(3)　1997

  59. Electrical properties of resonant tunneling diode with buried InAs quantum dots.

    成広充, 遊佐剛, 榊裕之

    応用物理学関係連合講演会講演予稿集　44th　1997

  60. Electron trapping and discharge process by InAs quantum dots in a novel GaAs/n-AlGaAs FET.

    遊佐剛, 榊裕之

    応用物理学関係連合講演会講演予稿集　44th　1997

  61. A novel GaAs/n-AlGaAs FET with embedded InAs quantum traps and its transport properties.

    遊佐剛, 榊裕之

    応用物理学関係連合講演会講演予稿集　43rd　(3)　1996

  62. Photoluminescence of GaAs quantum dots formed by in situ UHV process using InAs dot mask.

    野毛宏, 遊佐剛, 角屋豊, 辻野壮一郎, 榊裕之

    応用物理学会学術講演会講演予稿集　57th　1996

  63. A novel GaAs/n-AlGaAs photo FET with InAs quantum traps and its transport properties.

    遊佐剛, 榊裕之

    応用物理学会学術講演会講演予稿集　57th　(3)　1996

  64. GaAs dot structures formed by in situ UHV process using self-assembled InAs dots as mask for Cl2 etching.

    野毛宏, 遊佐剛, 角屋豊, 榊裕之

    応用物理学関係連合講演会講演予稿集　43rd　(1)　1996

  65. Electrical properties of single barrier diode with buried InAs quantum dots.

    成広充, 遊佐剛, 榊裕之

    応用物理学関係連合講演会講演予稿集　43rd　(3)　1996

  66. Electrical properties of the AlAs single barrier tunneling diode with the buried InAs quantum dots. 2.

    成広充, 遊佐剛, 榊裕之

    応用物理学会学術講演会講演予稿集　57th　(3)　1996

  67. GaAs dot structures formed by in situ UHV process using self-assembled InAs dots as mask for Cl2 etching.

    野毛宏, 遊佐剛, 角屋豊, 榊裕之

    応用物理学関係連合講演会講演予稿集　43rd　(3)　1996

  68. Transport property of 2DEG in single hetero structures with InAs dots.

    遊佐剛, 染谷隆夫, 大野祐三, 榊裕之

    応用物理学関係連合講演会講演予稿集　42nd　(Pt 3)　1995

Show all ︎Show first 5

Presentations 64

  1. ポテンシャル空間勾配による局在エッジ状態の長距離変形

    鄭潤賢, John, N. Moore, 堀田昌寛, 間野高明, 遊佐剛

    日本物理学会　2026/03/23

  2. アナログワームホールに向けた量子ホールバルク・エッジ励起

    鰈崎太貴, 鄭潤賢, John Nicholas Moore, 間野高明, 堀田昌寛, 高柳匡, 遊佐剛

    日本物理学会　2026/03/23

  3. Progress in Laboratory Quantum Cosmology with Quantum Hall Systems Invited

    International workshop Extreme Universe 2025　2025/10/29

  4. 膨張する量子ホールエッジの現在と課題

    鄭潤賢, 堀田昌寛, 間野高明, 遊佐剛

    場の理論の新しい計算方法2024　2024/12/20

  5. Toward quantum cosmology experiments in quantum Hall edges and probing their spacetime by ultrafast microscopy Invited

    GO YUSA

    Synthetic Electronic Quantum Matter 2024　2024/08/28

  6. 量子ホールエッジで創る時空を発光で探る Invited

    遊佐剛

    日本物理学会年次大会　2023/09/17

  7. Toward quantum cosmology experiments in quantum Hall edges and probing their spacetime by ultrafast microscopy Invited

    Go Yusa

    ExU-YITP School/Workshop on Quantum Information, Quantum Matter, and Quantum Gravity　2023/09/06

  8. Real-space and time visualization of excitons of the fractional quantum Hall edge Invited

    Go Yusa

    QHEdge-Grenoble　2023/07/04

  9. 時間・空間分解分光による量子ホール系の探索 Invited

    遊佐剛

    応用物理学会秋季学術講演会　2022/09/22

  10. 量子ホールエッジチャネルにおける一次元熱輸送の撮像

    John N. Moore, 神山晃範, 間野高明, 遊佐剛

    日本物理学会　2022/09/14

  11. Toward quantum cosmology experiments in quantum Hall systems Invited

    Go Yusa

    KEK IPNS-IMSS-QUP Joint workshop　2022/02/09

  12. 実空間でみる分数量子ホール系の物理 Invited

    遊佐剛

    Spin-RNJ年次報告会　2021

  13. 分数量子ホールエッジ状態の実空間・実時間観察

    神山晃範, 松浦雅広, John N. Moore, 間野高明, 野田武司, 遊佐剛

    日本物理学会 2020年秋季大会　2020/09

  14. Manipulation of wavepackets for the implementation of quantum protocol via the quantum Hall system

    Go Yusa

    The next generation of analogue gravity experiments　2019/12/09

  15. 時間分解顕微分光法を用いた量子ホール系における荷電励起子ダイナミクスの研究

    松浦雅広, 神山晃範, Moore John, 間野高明, 野田武司, 遊佐剛

    東北大学＆理研 第一回連携ワークショップ テラヘルツ光研究の新展開と産業応用への展望　2019/10/23

  16. 磁場印加PL顕微鏡を用いたGaN微細構造への酸素取り込みの研究

    神山晃範, 小島一信, 秩父重英, 遊佐剛

    東北大学＆理研 第一回連携ワークショップ テラヘルツ光研究の新展開と産業応用への展望　2019/10/23

  17. 時間分解顕微分光法を用いた量子ホール系における荷電励起子ダイナミクスの研究

    松浦雅広, 神山晃範, Moore John, 間野高明, 野田武司, 遊佐剛

    日本物理学会 2019 年秋季大会　2019/09/12

  18. Fractional quantum Hall fluid imaged by optically detected micro-MRI Invited

    Go Yusa

    International conference on "Emerging Advancement in Science & Technology"　2019/09/05

  19. 空間・時間分解PL を用いたGaN の局所励起子応答

    神山晃範, 小島一信, 遊佐剛, 秩父重英

    応用物理学会　2018/09

  20. Optically imaged stripes in fractional quantum Hall liquid International-presentation Invited

    YUSA Go

    23rd International Conference on High Magnetic Fields in Semiconductor Physics　2018/07/23

  21. Anomalous quantum Hall skyrmion transition with long-range orde

    Nicholas, N. Moore, Hikaru Iwata, Junichiro Hayakawa, Takaaki Mano, Takeshi Noda, Naokazu Shibata, Go Yusa

    Kick-off Symposium for World Leading Research Centers　2018/02

  22. Transmission and reflection of charge density waves in a quantum Hall edge controlled by a metal gate

    Matsuura Masahiro, Mano Takaaki, Noda Takeshi, Shibata Naokazu, Hotta Masahiro, Yusa Go

    Kick-off Symposium for World Leading Research Centers　2018/02

  23. 実空間観察でみる分数量子ホール系の非平衡状態 Invited

    遊佐剛

    非平衡・非エルミート系の新奇量子現象　2018

  24. Domain structures and nuclear spins in the quantum Hall regime observed in real-space and real-time Invited

    YUSA Go

    International Workshop on Physics of Semiconductor Devices　2017/12

  25. First-order phase transition of quantum Hall skyrmions observed by photoluminescence microscopy

    J. N. Moore, J. Hayakawa, H. Iwata, T. Mano, T. Noda, G. Yusa

    ISNTT2017　2017/12

  26. 量子ホールエッジにおける量子エネルギーテレポーテーションの試み

    松浦雅広, 野田武司, 間野高明, 堀田昌寛, 遊佐剛

    日本物理学会　2017/09

  27. 希釈磁性半導体InMnSeの基礎特性

    柏木一成, Amalia Patane, 遊佐剛

    応用物理学会　2017/09

  28. Photoluminescence investigation of a quantum Hall skyrmion transition

    Nicholas, N. Moore, Hikaru Iwata, Junichiro Hayakawa, Takaaki Mano, Takeshi Noda, Naokazu Shibata, Go Yusa

    2017/07

  29. Quantum Hall skyrmions investigated by photoluminescence

    J. N. Moore, J. Hayakawa, H. Iwata, T. Mano, T. Noda, G. Yusa

    日本物理学会2017年春季大会　2017/03

  30. 原子層物質InSeの低温、強磁場での顕微光学特性

    柏木一成, Amalia Patane, 遊佐剛

    日本物理学会2017年春季大会　2017/03

  31. Anomalous quantum Hall skyrmion transition with long-range ordering

    International Symposium on Hybrid Quantum Systems　2017

  32. Hybrid quantum systems based on two-dimensional van der Waals crystals Invited

    International Symposium on Hybrid quantum System 2017　2017

  33. Spatial-temporal photoluminescence imaging of non-equilibrium fractional quantum Hall liquid dynamics International-presentation

    J. N. Moore, J. Hayakawa, T. Mano, T. Noda, G. Yusa

    33th International Conference on the Physics of Semiconductors　2016/07/31

  34. Real-space imaging of fractional quantum Hall liquid International-presentation Invited

    YUSA Go

    EMN Spring 2016　2016/03/08

  35. Real-space and real-time imaging of non-equilibrium fractional quantum Hall liquid dynamics

    J. N. Moore, J. Hayakawa, T. Mano, T. Noda, G. Yusa

    日本物理学会2016年春季大会　2016/03

  36. Topological structures of the fractional quantum Hall state in real-space images

    J. N. Moore, J. Hayakawa, T. Mano, T. Noda, G. Yusa

    「トポロジーが紡ぐ物質科学のフロンティア」第1回領域研究会　2015/11

  37. Nuclear polarization in a topological excited state of the fractional quantum Hall effect International-presentation

    J. N. Moore, J. Hayakawa, T. Mano, T. Noda, G. Yusa

    Quantum Nanostructures and electron-nuclear spin interaction　2015/10/19

  38. Real-space Imaging ofFractional Quantum Hall liquid in non-equilibrium state International-presentation

    J. N. Moore, J. Hayakawa, T. Mano, T. Noda, G. Yusa

    Physics of bulk-edge correspondence & its universality From solid state physics to cold atoms workshop 2015　2015/09/27

  39. A new topological state of the fractional quantum Hall effect imaged by spin-sensitive photoluminescence microscopy

    J. N. Moore, J. Hayakawa, T. Mano, T. Noda, G. Yusa

    日本物理学会2015年秋季大会　2015/09

  40. Real-space Imaging of Fractional Quantum Hall Effect International-presentation

    Physics for Sustainable Development & Technology (ICPSDT-2015)　2015/08/19

  41. Spatial electron spin imaging for investigation of dynamic nuclear polarization inthe fractional quantum Hall effect breakdown regime International-presentation

    J. N. Moore, J. Hayakawa, T. Mano, T. Noda, G. Yusa

    The 21th international conference on Electronic Properties of Two-Dimensional Systems　2015/07/26

  42. 偏光分光実空間マッピングによる分数量子ホール液体の相転移の解明

    日本物理学会第70回年次大会　2015/03

  43. Implementation of quantum energy teleportation via the quantum Hall system International-presentation

    YITP Workshop on Quantum Information Physics　2014/08

  44. Real-space Imaging of Fractional Quantum Hall Effect International-presentation

    International conference on quantum information and quantum computation　2013/12

  45. Real-space Imaging of Fractional Quantum Hall Effect International-presentation

    The 3rd Summer School on Semiconductor/Superconducting Quantum Coherence Effects and Quantum Information　2013/08

  46. Real-space Imaging of Fractional Quantum Hall Effect International-presentation

    J. Hayakawa, K. Muraki

    The 20th international conference on Electronic Properties of Two-Dimensional Systems　2013/07/01

  47. Quantum Energy Protocol in the Quantum Hall System International-presentation

    International Conference on Quantum Information and Quantum Computing　2013/01/07

  48. Quantum Energy teleportation in the Quantum Hall System International-presentation

    Quantum Vacuum Kawatabi　2012/10/21

  49. Real-space Imaging of Fractional Quantum Hall liquids International-presentation

    DYCE International Workshop　2012/08/07

  50. Passivity breaking in the quantum Hall system International-presentation

    W. Izumida, M. Hotta

    The 19th international conference on Electronic Properties of Two-Dimensional Systems　2011/07/25

  51. Imaging method for microscopic multi-nuclear spin systems (I > 1/2) International-presentation

    T. Kawamura

    International Symposium on Nanoscale Transport and Technology　2011/01/11

  52. Optical studies of the spin-phase transtion in the nu=2/3 fractional quantum Hall state International-presentation

    J. Hayakawa, K. Muraki

    International Symposium on Nanoscale Transport and Technology　2011/01/11

  53. Electrically controlled quantum coherences of nuclear spins in GaAs point contacts International-presentation

    IVth International Workshop on the Physics of Semiconductor Devices　2009/12/15

  54. Resistively detected NMR in semiconductor nanostructures International-presentation

    IISc(Indian Institute of Science) Centenary Symposium on Future Directions in NMR　2008/10

  55. Electrically Controlled Quantum Coherences of Nuclear Spins in GaAs Point Contacts International-presentation

    K. Muraki, Y. Hirayama

    CNSI-RIEC Workshop　2008/10

  56. Electrically controlled quantum coherences of nuclear spins in GaAs point contacts International-presentation

    K. Muraki, Y. Hirayama

    The 34th International Symposium on Compound Semiconductors　2007/09

  57. Controlled multiple quantum coherences of nuclear spins in a nanoscale device International-presentation

    K. Muraki, Y. Hirayama

    International Conference on Electronic Properties of Two-dimensional Systems and Modulated Semiconductor Structures　2007/07

  58. Resistively detected NMR in a nanoscale device and direct detection of multiple quantum coherences International-presentation

    Gordon Research Conference Magnetic Resonance　2007/06

  59. Coherent manipulation of nuclear spins in a monolithic semiconductor device International-presentation

    Gordon Research Conference Quantum Information Science　2007/04

  60. Controlled multiple quantum coherences of nuclear spins International-presentation

    G. Yusa, K. Muraki, K. Takashina, K. Hashimoto, Y. Hirayama

    4th Interantional Conference on Applications of Spin-related Phenomena in Semiconductors　2006/08

  61. Nuclear spin control by a point contact International-presentation

    G. Yusa, K. Muraki, K. Takashina, K. Hashimoto, Y. Hirayama

    28th International Conference on the Physics of Semiconductors　2006/07

  62. Controlled multiple quantum coherences of nuclear spins in a nanometer-scale Device International-presentation

    K. Muraki, K. Takashina, K. Hashimoto, Y. Hirayama

    50th Magnetism and Magnetic Materials Conference　2005/10

  63. Self-sustaining resistance oscillations: Electron-nuclear spin coupling in mesoscopic quantum Hall devices International-presentation

    K. Muraki, K. Takashina, T. Saku, K. Hashimoto, Y. Hirayama

    The American Physical Society　2005/03

  64. 極低温・強磁場顕微鏡による窒化ガリウム中の不純物の可視化

    神山晃範, 小島一信, 秩父重英, 遊佐剛

    東北大学理学研究科6専攻+生命科学研究科 合同シンポジウム 2020　2019/02/14

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Industrial Property Rights 6

  1. 核スピン状態の制御方法、検出方法、制御装置および検出方法

    村木康二, 早川純一朗, 遊佐剛

    特2012-165393

    Property Type: Patent

  2. 分光計測装置

    村木康二, 早川純一朗, 遊佐剛

    特2011-221545

    Property Type: Patent

  3. 分光計測装置

    村木康二, 早川純一朗, 遊佐剛

    特2010-223607

    Property Type: Patent

  4. 核磁気共鳴撮像素子、及びそれを用いた撮像システム、撮像方法

    遊佐剛

    P/JP2007/073138

    Property Type: Patent

  5. 核磁気共鳴撮像素子、及びそれを用いた撮像システム、撮像方法

    遊佐剛

    特2007-145488

    Property Type: Patent

  6. 核磁気共鳴撮像システム及び撮像方法

    遊佐剛

    特2006-324443

    Property Type: Patent

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Research Projects 21

  1. 超高速時間分解顕微鏡による量子ホールエッジの時空測定

    遊佐 剛

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(A)

    Institution: 東北大学

    2024/04/01 - 2028/03/31

    More details Close

    2024年度は研究計画の「(1)測定技術に関する研究」のうち、「(1-1) 顕微鏡の整備と時間分解能の向上に関する研究」および 「(1-2) 試料構造の最適化」を中心に進めた。最終的な本測定には40 mK程度の希釈冷凍機を用いた走査型ストロボ顕微鏡によって行うが、多くのデバイスの中から本測定に用いるデバイスを選別したり、共同研究者から提供されたGaAsウエハーの電子密度や移動度、ゲートやヒステリシス特性など、基本特性を従来の4Kから1.5 Kで測定できるようにするため、新たに測定プローブの開発を進めた。まだ計測時間の向上の余地があるものの、基本部分の作製は完了した。また、(1-2)に関しては、同径方向数十ミクロンにわたって、表面ステップが10nm以下の段差をもつ試料構造を作成し、その上に膨張用の金属ゲートを設置し、励起、検出ゲートも有するデバイスを実際に作製することに成功した。40mKにおける顕微分光測定によって、設計通りポテンシャルが同心円状に連続的に変化することが確認された。これにより、数10%を超える膨張/収縮実験が可能になり、今後の量子宇宙シミュレーター用の試料作製に関して大きな前進といえる。 「(2)ストロボ顕微鏡を用いた測定と解析」に関しては、励起ゲートにDCバイアスを印可することにより、エッジの励起信号が増大するという現象を新たに発見した。これにより、より効果的にエッジの励起を生成させことができるようになっただけでなく、エッジだけでなく、バルクを励起させることも可能になった。これらの励起がマグネトプラズモン描像で説明できることが明らかになった。これは今後のワームホールやブレーンワールドシミュレーターの基礎となる成果である。

  2. The Natural Laws of Extreme Universe--A New Paradigm for Spacetime and Matter from Q uantum Information

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Transformative Research Areas (A)

    Category: Grant-in-Aid for Transformative Research Areas (A)

    Institution: Kyoto University

    2021/09/10 - 2026/03/31

  3. Quantum cosmology experiments in quantum Hall systems

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Transformative Research Areas (A)

    Category: Grant-in-Aid for Transformative Research Areas (A)

    Institution: Tohoku University

    2021/09/10 - 2026/03/31

  4. Nonequilibrium states of low-dimensional quasiparticles in a mesoscopic quantum Hall system

    Fujisawa Toshimasa

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)

    Category: Grant-in-Aid for Scientific Research (S)

    Institution: Tokyo Institute of Technology

    2019/06/26 - 2024/03/31

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    This research aims to establish control and observation techniques for one-dimensional quasiparticles (such as plasmons) and two-dimensional quasiparticles (such as fractional charges) by focusing on mesoscopic quantum Hall systems in which functional quantum devices are integrated into semiconductor heterostructures under strong magnetic fields. By doing so, we will elucidate the conduction control of Tomonaga-Luttinger liquids and unique non-equilibrium phenomena in integer and fractional quantum Hall regimes. Furthermore, we will explore the physical properties of fractional charge tunneling processes and Andreev reflection, and conduct research towards highly efficient quantum-Hall heat engines utilizing non-thermal states of one-dimensional quasiparticles and braiding manipulation of two-dimensional quasiparticles.

  5. 1D Thermal Transport Dynamics in Quantum Hall Edge Channels

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows

    Category: Grant-in-Aid for JSPS Fellows

    Institution: Tohoku University

    2021/04/28 - 2023/03/31

  6. Nanostructure physics explored by optically detected time-resolved magnetic imaging.

    Yusa Go

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2017/04/01 - 2021/03/31

    More details Close

    In this project, we developed optically detected magnetic imaging and its derivative imaging techniques. We explored multifaceted phenomena in nanostructures involving nuclear spins, charges and spins of electrons, holes, and excitons in GaAs, GaN, and dichalcogenides. Our imaging wavelength spanned from 350 nm in the ultraviolet to 800 nm in the near infrared regime. Using the unique imaging techniques developed in this project, we successfully studied many-body effects of skyrmions, real-space and real-time imaging of excited states of chiral edge channels of integer and fractional quantum Hall effects, and spin helix transport in GaAs systems. In GaN systems, we revealed the type and the spatial distribution of impurities. We also studied photoconductivity in graphene/InSe devices and showed new potential applications of Van der Waals crystals.

  7. Probing and harnessing spin and charge in van der Waals two-dimensional crystals

    Offer Organization: Royal Society

    2016/10 - 2018/09

  8. 光検出MRI法によるナノスケールイメージングの物性物理への展開

    遊佐 剛

    Offer Organization: 旭硝子財団

    2017/06 - 2018/03

  9. ナノスケール磁気イメージング法の物性物理への応用

    遊佐 剛

    Offer Organization: 公益財団法人 三菱財団

    System: 自然科学研究助成

    2014/10 - 2015/09

  10. Demonstration of collective quantum information processes in semiconductor nanostructures

    YUSA Go

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2012/04/01 - 2015/03/31

    More details Close

    Standard approach for quantum computation and information process is based on two-level systems, qubits. This research project, however, aims for new quantum information processing based on collective quantum system taking advantage of continuous variable of the field. During the projet term, we obtained a wide variety of results. We proposed a new approach for quantum energy teleportation to overcome the limitation of distance by introducing a squeezed state between a sender (A) and a receiver (B). We also demonstrated real-space imaging of collective nuclear spins by optically detected micro magnetic resonance.

  11. 顕微フォトルミネッセンスによる微細構造における核スピン偏極空間分布の直接観察

    遊佐 剛, 村木 康二

    Offer Organization: NTT物性基礎研究所

    System: NTT物性基礎研共同研究費

    2011/09 - 2012/02

  12. 顕微フォトルミネッセンスによる電流駆動磁壁ダイナミクスの直接観察

    遊佐 剛, 村木 康二

    Offer Organization: NTT物性基礎研究所

    System: NTT物性基礎研共同研究費

    2010/09 - 2011/02

  13. Collective quantum information processes using quantum entanglement of ensemble nuclear spins in semiconductor nanostructures

    YUSA Go

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2009 - 2011

    More details Close

    This research project aims for new quantum information processing based on collective quantum systems. During the project term, we obtained a wide variety of results : A proposal of a method to access nuclear spin information in a microscopic region, a proposal and theoretical verification of a new quantum protocol termed quantum energy teleportation using quantum Hall edge channels, real-space imaging of the quantum Hall systems.

  14. 半導体ナノ構造中の同核種および異核種スピン結合のコヒーレント制御

    遊佐 剛

    Offer Organization: 村田財団

    System: 村田財団寄付金

    2009/08 - 2010/07

  15. 高速電流測定による半導体ナノ構造中の横磁化検出核磁気共鳴法

    Offer Organization: 住友財団

    System: 住友財団寄付金

    2009/08 - 2010/07

  16. 顕微フォトルミネッセンスによるnu = 2/3スピンドメインの直接観察

    遊佐 剛, 村木 康二

    Offer Organization: NTT物性基礎研究所

    System: NTT物性基礎研共同研究費

    2009/06 - 2010/03

  17. ナノスケール磁気イメージング法の提案と量子情報処理への応用

    遊佐 剛

    Offer Organization: 稲盛財団

    System: 稲盛財団寄付金

    2008/04 - 2009/03

  18. Controlled Quantum States of Nuclear Spins by Novel Nuclear Magnetic Resonance Competitive

    System: JST Basic Research Programs (Precursory Research for Embryonic Science and Technology :PRESTO)

    2005/10 - 2009/03

  19. Quantum entanglement of ensemble spins and ensemble quantum computation in solids

    YUSA Go

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (A)

    Category: Grant-in-Aid for Young Scientists (A)

    Institution: Tohoku University

    2007 - 2008

  20. 新構造量子ドットにおける電子状態の解明とデバイス応用

    遊佐 剛

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 特別研究員奨励費

    Category: 特別研究員奨励費

    Institution: 東京大学

    2001 - 2001

  21. 半導体量子箱構造の新しい作製法とその電子物性の研究

    遊佐 剛

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 特別研究員奨励費

    Category: 特別研究員奨励費

    Institution: 東京大学

    1998 - 1998

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Teaching Experience 14

  1. Analytical Mechanics　Tohoku University

  2. Introduction to Physical Science　Tohoku University

  3. Introduction to solid state spectroscopy　Department of Physics Tohoku University

  4. Computational Physics　Tohoku University, Faculty of Science

  5. Electrodynamics　Tohoku University, Faculty of Science

  6. Basic Seminar　Tohoku University

  7. Electrodynamics　Tohoku University

  8. 自然界の構造　東北大学理学部

  9. Introduction to Solid State Spectroscopy　Department of Physics Tohoku University

  10. Basic Seminar　Tohoku University

  11. Computational Physics　Tohoku University

  12. 物理学D　東北大学

  13. Solid State Physics III　Tohoku University

  14. Solid State Physics II　Tohoku University

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Social Activities 7

  1. 原子核スピンの状態を顕微鏡で観察

    2017/02/03 -

  2. Energy teleport study could unlock quantum computer, black hole secrets

    2014/02/10 -

  3. Energy can be teleported over long distances, say physicists

    2014/01/27 -

  4. Squeezed light to teleport quantum energy

    2014/01/23 -

  5. Energy Teleportation Overcomes Distance Limit

    2014/01/16 -

  6. 液体のような電子撮像 特殊な顕微鏡使い可視化

    2012/12 -

  7. 絶対零度付近の特殊現象見える化

    2012/12 -

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Other 15

  1. 光検出MRI法によるナノスケールイメージングの物性物理への展開

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    光検出磁気イメージング法を様々な半導体物質に応用することで様々な低次元系の物理現象の解明を目指す。

  2. Probing and harnessing spin and charge in van der Waals two-dimensional crystals

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    新しい二次元のファンデルワールスIII-IV族半導体を開発する。ファンデルワールス結晶のヘテロ接合を作成し、電子輸送特性、光学特性を測定する。

  3. 低次元半導体構造の光ダイナミクス

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    低次元半導体構造の光ダイナミクスについての共同研究

  4. 二次元半導体構造の光物性

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    低次元半導体構造の光ダイナミクスについての共同研究

  5. ナノスケール磁気イメージング法の物性物理への応用

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    光検出あるいは抵抗検出の核磁気共鳴をさらに発展させ、磁気イメージング法として応用することで様々な低次元系の物理現象の解明を目指す。

  6. 半導体低次元構造の物理

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    半導体低次元構造を作製し物理を探索する。

  7. 顕微フォトルミネッセンスによる微細構造における核スピン偏極空間分布の直接観察

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    顕微フォトルミネッセンスによる微細構造における核スピン偏極空間分布の直接観察

  8. 顕微フォトルミネセンスによる電流駆動磁壁ダイナミクスの直接観察

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    電流駆動の磁壁ダイナミクスを調べることで、核スピン偏極の機構を解明する。

  9. 顕微フォトルミネッセンスによる電流駆動磁壁ダイナミクスの直接観察

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    顕微フォトルミネッセンスによる電流駆動磁壁ダイナミクスの直接観察

  10. 高速電流測定による半導体ナノ構造中の横磁化検出核磁気共鳴法

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    半導体ナノ構造中における核スピンの量子状態を、核スピのもつ横磁化成分を検出することによって実現する。

  11. 半導体ナノ構造中の同核種および異核種スピン結合のコヒーレント制御

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    半導体のナノ構造の中に存在する同じ核種、あるいは異なる核種間のスピン結合をコヒーレントに制御する。

  12. 顕微フォトルミネッセンスによるnu=2/3スピンドメインの直接観察

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    高純度GaAs/AlGaAs量子井戸を電界効果トランジスター構造に加工した試料に対して、極低温強磁場環境でフォトルミネッセンス測定(PL)と電気輸送測定を行い、nu=2/3分数量子ホール状態で理論的に予測されているスピンドメインの直接観察を行う。

  13. 顕微フォトルミネッセンスによるnu=2/3スピンドメインの直接観察

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    顕微フォトルミネッセンスによるnu=2/3スピンドメインの直接観察

  14. ナノスケール磁気イメージング法の提案と量子情報処理への応用

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    ナノスケール磁気イメージング法の提案と量子情報処理への応用

  15. 新しい核磁気共鳴を用いた核スピンの量子状態制御

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    分析技術として世の中で広く使われている核磁気共鳴(NMR)は原子核の持つ核スピンという性質を用いています。最近このNMRの手法を用いて、核スピンを素子とする量子コンピュータが注目されるようになってきました。本研究では、従来と異なる新しいNMR手法を用いてナノ領域の少数核スピンを操り、電子や光と融合させることで、核スピンを用いた量子情報処理装置や量子中継器などの量子機能デバイスの実現を目指します。

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