HIDEAKI OBUSE

J-GLOBAL         Last updated: Aug 29, 2019 at 14:50
 
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Name
HIDEAKI OBUSE
Affiliation
Hokkaido University
Research funding number
50415121

Academic & Professional Experience

 
Apr 2011
 - 
Oct 2012
KIT
 

Published Papers

 
Xiao Lei, Qiu Xingze, Wang Kunkun, Bian Zhihao, Zhan Xiang, Obuse Hideaki, Sanders Barry C., Yi Wei, Xue Peng
PHYSICAL REVIEW A   98(6)    Dec 2018   [Refereed]
Endo Takako, Konno Norio, Obuse Hideaki, Segawa Etsuo
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL   50(45)    Nov 2017   [Refereed]
L Xiao, X Zhan, ZH Bian, KK Wang, X Zhang, XP Wang, J Li, K Mochizuki, D Kim, N Kawakami, W Yi, H Obuse, BC Sanders, P Xue
Nature Physics   13 1117-1123   Jul 2017   [Refereed]
Effects of disorder on non-unitary PT symmetric quantum walks
Ken Mochizuki and Hideaki Obuse
23 95-103   2017   [Refereed]
Floqeut Topological Phases in PT Symmetric Quantum Walks with Gain and Loss
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)      2017   [Refereed]
Mochizuki Ken, Kim Dakyeong, Obuse Hideaki
PHYSICAL REVIEW A   93(6)    Jun 2016   [Refereed]
Obuse Hideaki, Asboth Janos K., Nishimura Yuki, Kawakami Norio
PHYSICAL REVIEW B   92(4)    Jul 2015   [Refereed]
Hideaki Obuse, Shinsei Ryu, Akira Furusaki, Christopher Mudry
Phys. Rev. B 89, 155315 (2014)   89(15)    Oct 2013   [Refereed]
A two-dimensional spin-directed Tex network model is
constructed that describes the combined effects of dimerization and disorder
for the surface states of a weak three-dimensional Tex
topological insulator. The...
Hideaki Obuse, Soumya Bera, Andreas W. W. Ludwig, Ilya A. Gruzberg, Ferdinand Evers
Europhys. Lett. 104, 27014 (2013) (Editor's Choice)      Apr 2013
We study the critical behavior near the integer quantum Hall plateau
transition by focusing on the multifractal (MF) exponents Tex describing the
scaling of the disorder-average moments of the point contact conductance Tex
between two points of ...
János. K. Asbóth, Hideaki Obuse
Phys. Rev. B 88, 121406(R) (2013) [5 pages]   88(12)    Mar 2013   [Refereed]
Discrete-time quantum walks (DTQW) have topological phases that are richer
than those of time-independent lattice Hamiltonians. Even the basic symmetries,
on which the standard classification of topological insulators hinges, have not
yet been pro...
Hideaki Obuse, Ilya A. Gruzberg, Ferdinand Evers
Phys. Rev. Lett. 109, 206804 (2012)   109(20)    May 2012   [Refereed]
We present a numerical finite size scaling study of the localization length
in long cylinders near the integer quantum Hall transition (IQHT) employing the
Chalker-Coddington network model. Corrections to scaling that decay slowly with
increasing ...
Roberto Bondesan, Ilya A. Gruzberg, Jesper Lykke Jacobsen, Hideaki Obuse, Hubert Saleur
Phys. Rev. Lett. 108, 126801 (2012)      Sep 2011
Critical properties of quantum Hall systems are affected by the presence of
extra edge channels - present, in particular, at higher plateau transitions. We
study this phenomenon for the case of the spin quantum Hall transition. Using
supersymmetry...
Hideaki Obuse, Norio Kawakami
Phys. Rev. B 84, 195139 (2011)   84(19)    Mar 2011   [Refereed]
We investigate one-dimensional (1D) discrete time quantum walks (QWs) with
spatially or temporally random defects as a consequence of interactions with
random environments. We focus on the QWs with chiral symmetry in a topological
phase, and revea...
K. Kobayashi, T. Ohtsuki, H. Obuse, K. Slevin
Phys. Rev. B 82, 165301 (2010)      Jul 2010
We study numerically the charge conductance distributions of disordered
quantum spin-Hall (QSH) systems using a quantum network model. We have found
that the conductance distribution at the metal-QSH insulator transition is
clearly different from ...
Shinsei Ryu, Christopher Mudry, Hideaki Obuse, Akira Furusaki
New J. Phys. 12, 065005 (2010)      Dec 2009
The quantum spin Hall effect shares many similarities (and some important
differences) with the quantum Hall effect for the electric charge. As with the
quantum (electric charge) Hall effect, there exists a correspondence between
bulk and boundary...
Hideaki Obuse, Arvind R. Subramaniam, Akira Furusaki, Ilya A. Gruzberg, Andreas W. W. Ludwig
Phys. Rev. B 82, 035309 (2010)      Nov 2009
We generalize universal relations between the multifractal exponent \alpha_0
for the scaling of the typical wave function magnitude at a (Anderson)
localization-delocalization transition in two dimensions and the corresponding
critical finite size...
Koji Kobayashi, Kosuke Hirose, Hideaki Obuse, Tomi Ohtsuki, Keith Slevin
J. Phys.: Conf. Ser. 150 (2009) 022041      Sep 2008
We study the transport properties of disordered electron systems that contain
perfectly conducting channels. Two quantum network models that belong to
different universality classes, unitary and symplectic, are simulated
numerically. The perfectly...
Hideaki Obuse, Akira Furusaki, Shinsei Ryu, Christopher Mudry
Phys. Rev. B 78, 115301 (2008)      May 2008
Static disorder in a noninteracting gas of electrons confined to two
dimensions can drive a continuous quantum (Anderson) transition between a
metallic and an insulating state when time-reversal symmetry is preserved but
spin-rotation symmetry is ...
Hideaki Obuse, Arvind R. Subramaniam, Akira Furusaki, Ilya A. Gruzberg, Andreas W. W. Ludwig
Physica E 40, 1404 (2008)      Sep 2007
We investigate boundary multifractality of critical wave functions at the
Anderson metal-insulator transition in two-dimensional disordered
non-interacting electron systems with spin-orbit scattering. We show
numerically that multifractal exponent...
Shinsei Ryu, Christopher Mudry, Hideaki Obuse, Akira Furusaki
Phys. Rev. Lett. 99, 116601 (2007)      Feb 2007
We discuss, for a two-dimensional Dirac Hamiltonian with random scalar
potential, the presence of a Tex topological term in the non-linear sigma
model encoding the physics of Anderson localization in the symplectic symmetry
class. The Tex topo...
Hideaki Obuse, Akira Furusaki, Shinsei Ryu, Christopher Mudry
Phys. Rev. B 76, 075301 (2007)      Feb 2007
The effects of static disorder on the Z_2 quantum spin-Hall effect for
non-interacting electrons propagating in two-dimensional space is studied
numerically. A two-dimensional time-reversal symmetric network model is
constructed to account for the...
H. Obuse, K. Yakubo
J. Phys. Soc. Jpn. Suppl. 74, 242 (2005)      Nov 2004
We study spatial structures of anomalously localized states (ALS) in tail
regions at the critical point of the Anderson transition in the two-dimensional
symplectic class. In order to examine tail structures of ALS, we apply the
multifractal analy...
H. Obuse, K. Yakubo
Phys. Rev. B 69, 125301 (2004)      May 2004
Anomalously localized states (ALS) at the critical point of the Anderson
transition are studied for the SU(2) model belonging to the two-dimensional
symplectic class. Giving a quantitative definition of ALS to clarify
statistical properties of the...
H. Obuse, K. Yakubo
Phys. Rev. B 71, 035102 (2005)      May 2004
We study the level-spacing distribution function Tex at the Anderson
transition by paying attention to anomalously localized states (ALS) which
contribute to statistical properties at the critical point. It is found that
the distribution Tex...
H. Obuse, K. Yakubo
J. Phys. Soc. Jpn. 73, 2164 (2004)      May 2004
We study the box-measure correlation function of quantum states at the
Anderson transition point with taking care of anomalously localized states
(ALS). By eliminating ALS from the ensemble of critical wavefunctions, we
confirm, for the first time...
Fluctuations of the correlation dimension of critical wavefunctions in two-dimensional symplectic systems
Yakubo Kousuke, Obuse Hideaki
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   72    Feb 2003   [Refereed]

Misc

 
Shimizu Yosuke, Obuse Hideaki
Meeting Abstracts of the Physical Society of Japan   72(0) 598-598   2017
Mochizuki Ken, Kawakami Norio, Obuse Hideaki
Meeting Abstracts of the Physical Society of Japan   72(0) 1008-1008   2017
Fujisawa Yusuke, Yakubo Kousuke, Kawakami Norio, Obuse Hideaki
Meeting Abstracts of the Physical Society of Japan   72(0) 1009-1009   2017
Obuse Hideaki
Meeting Abstracts of the Physical Society of Japan   72(0) 2794-2795   2017
Obuse Hideaki, Wang X.P., Li J., Yi W., Xue P., Mochizuki Ken, Kim Dakyeong, Kawakami Norio, Xiao L., Zhan X., Bian Z.H., Wang K.K., Zhang X.
Meeting Abstracts of the Physical Society of Japan   72(0) 1347-1347   2017
<p>散逸を伴うPT対称な1次元量子ウォークにおけるフロッケトポロジカル相を理論的に調べた。さらに、散逸の効果を取り入れたフォトニック量子ウォークにおけるエッジ状態を実験的に観測した。その結果、実験結果と、バルク-エッジ対応による理論結果が一致することが分かった。さらに、エッジ状態のPT対称性の破れに伴う、時間発展における確率の指数関数的増幅が起こることも実験的に確認できた。</p>
Shimizu Yosuke, Obuse Hideaki
Meeting Abstracts of the Physical Society of Japan   71(0) 501-501   2016
<p>量子ウォークにおける量子探索問題では、グローバー・アルゴリズムに基づくグローバー・ウォークに関する理論研究が盛んに行われている。しかし、高次元のグローバー・ウォークを実現するためには、多数の内部自由度を有する粒子が必要とされる。本研究では、内部自由度が2自由度でありながら2次元量子ウォークを実現するアダマール・ウォークを用いても、量子探索が可能であることを数値的・解析的に示す。</p>
Mochizuki Ken, Obuse Hideaki
Meeting Abstracts of the Physical Society of Japan   71(0) 1208-1208   2016
<p>光ファーバーループを用いた非ユニタリー量子ウォークの実験では、空間反転と時間反転を組み合わせたPT対称性によって擬エネルギーが実数となることが知られている。本研究では、この系において、コイン演算子のパラメータが空間的に不規則で、時間発展演算子がPT対称性を有していなくても、擬エネルギーが実数となる場合があること、およびその原因を明らかにした。</p>
Obuse Hideaki
Meeting Abstracts of the Physical Society of Japan   71(0)    2016
Obuse Hideaki
日本物理学会誌   70(1) 14-24,3   Jan 2015
It has been passed more than fifty years since P. W. Anderson had theoretically predicted localizations of electrons in disordered systems. The concepts of the Anderson localization and transition have been important in the condensed matter physic...
Obuse H., Asboth Janos K., Nishimura Y., Kawakami N.
Meeting Abstracts of the Physical Society of Japan   70(0)    2015
Endo Takako, Konno Norio, Obuse Hideaki
Meeting Abstracts of the Physical Society of Japan   70(0)    2015
Bera S., Ludwig A. W. W., Gruzberg I. A., Evers F.
Epl   104(2)    Oct 2013
We study the critical behavior near the integer quantum Hall plateau transition by focusing on the multifractal (MF) exponents X-q describing the scaling of the disorder-average moments of the point contact conductance T between two points of the ...
Obuse Hideaki
Meeting abstracts of the Physical Society of Japan   68(1)    Mar 2013
Kim Dakyeong, Mochizuki Ken, Obuse Hideaki
Meeting Abstracts of the Physical Society of Japan   70(0)    2015
Obuse H., Bondesan R., Gruzberg I. A., Jacobsen J. L., Saleur H.
Meeting abstracts of the Physical Society of Japan   68(1)    Mar 2013
Mochizuki Ken, Kim Dakyeong, Obuse Hideaki
Meeting Abstracts of the Physical Society of Japan   70(0)    2015
小布施秀明, 笠真生, 古崎昭, MUDRY Christopher
日本物理学会講演概要集   69(1) 699   Mar 2014
Obuse H., Ryu S., Furusaki A., Mudry C.
Meeting Abstracts of the Physical Society of Japan   69(0)    2014
Nishimura Y., Obuse H., Kawakami N.
Meeting abstracts of the Physical Society of Japan   67(2)    Aug 2012
Obuse H., Ryu S., Furusaki A., Mudry Christopher
Meeting Abstracts of the Physical Society of Japan   69(0)    2014
小布施秀明, ASBOTH Janos K.
日本物理学会講演概要集   68(2) 609   Aug 2013
Nishimura Y., Obuse H., Kawakami N.
Meeting abstracts of the Physical Society of Japan   67(1)    Mar 2012
西村勇希, 小布施秀明, 川上則雄
日本物理学会講演概要集   68(2) 609   Aug 2013
Obuse Hideaki, Kawakami Norio
Meeting abstracts of the Physical Society of Japan   66(2)    Aug 2011
小布施秀明, BONDESAN R., GRUZBERG I. A., JACOBSEN J. L., SALEUR H.
日本物理学会講演概要集   68(1) 758   Mar 2013
Obuse Hideaki, Kawakami Norio
Meeting abstracts of the Physical Society of Japan   66(1)    Mar 2011
小布施秀明, 小布施秀明
日本物理学会講演概要集   68(1) 757   Mar 2013
Nishimura Y., Obuse H., Kawakami N.
Meeting Abstracts of the Physical Society of Japan   68(0)    2013
Obuse H., Gruzberg I. A., Bera S., Evers F., Ludwig A. W. W.
Meeting abstracts of the Physical Society of Japan   65(2)    Aug 2010
西村勇希, 小布施秀明, 川上則雄
日本物理学会講演概要集   67(2) 262   Aug 2012
Obuse H., Furusaki A., Ryu S., Gruzberg I. A., Mudry C.
Meeting abstracts of the Physical Society of Japan   65(1)    Mar 2010
Obuse H., Gruzberg I. A., Bera S., Evers F., Ludwig A. W. W.
Meeting abstracts of the Physical Society of Japan   65(1)    Mar 2010
西村勇希, 小布施秀明, 川上則雄
日本物理学会講演概要集   67(1) 732   Mar 2012
Obuse H., Furusaki A., Ryu S., Mudry C.
Meeting abstracts of the Physical Society of Japan   63(2)    Aug 2008
Kobayashi K., Hirose K., Obuse H., Ohtsuki T., Slevin K.
Meeting abstracts of the Physical Society of Japan   63(2)    Aug 2008
小布施秀明, 川上則雄
日本物理学会講演概要集   66(2) 701   Aug 2011
Obuse H., Furusaki A., Ryu S., Mudry C.
Meeting abstracts of the Physical Society of Japan   63(1)    Feb 2008
Obuse H., Furusaki A.
Meeting abstracts of the Physical Society of Japan   62(2)    Aug 2007
小布施秀明, 川上則雄
日本物理学会講演概要集   66(1) 167   Mar 2011
Obuse H., Furusaki A., Ryu S, Mudry C.
Meeting abstracts of the Physical Society of Japan   62(1)    Feb 2007
Obuse H., Furusaki A.
Meeting abstracts of the Physical Society of Japan   62(1)    Feb 2007
小布施秀明, GRUZBERG I.A., BERA S., EVERS F., LUDWIG A.W.W.
日本物理学会講演概要集   65(2) 662   Aug 2010
Obuse H., Furusaki A.
Meeting abstracts of the Physical Society of Japan   61(2)    Aug 2006
Obuse H., Yakubo K.
Meeting abstracts of the Physical Society of Japan   61(1)    Mar 2006
Obuse H., Yakubo K.
Meeting abstracts of the Physical Society of Japan   60(2)    Aug 2005
Yakubo K., Obuse H.
Meeting abstracts of the Physical Society of Japan   59(2)    Aug 2004
Obuse H., Yakubo K.
Meeting abstracts of the Physical Society of Japan   59(2)    Aug 2004
Obuse H., Yakubo K.
Meeting abstracts of the Physical Society of Japan   59(1)    Mar 2004
Obuse H., Yakubo K.
Meeting abstracts of the Physical Society of Japan   58(1)    Mar 2003
Obuse H., Shima H., Nakayama T.
Meeting abstracts of the Physical Society of Japan   56(1)    Mar 2001
Obuse H., Shima H., Nakayama T.
Meeting abstracts of the Physical Society of Japan   55(2)    Sep 2000
Obuse H., Yakubo K.
Meeting Abstracts of the Physical Society of Japan   57(0)    2002