Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Obuse H"'
The symmetries associated with discrete-time quantum walks (DTQWs) and the flexibilities in controlling their dynamical parameters allow to create a large number of topological phases. An interface in position space, which separates two regions with
Externí odkaz:
http://arxiv.org/abs/1502.00436
Publikováno v:
Phys. Rev. B 82, 165301 (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 tha
Externí odkaz:
http://arxiv.org/abs/1007.4073
Publikováno v:
Phys.Rev.Lett.101:116802,2008
We study multifractal spectra of critical wave functions at the integer quantum Hall plateau transition using the Chalker-Coddington network model. Our numerical results provide important new constraints which any critical theory for the transition w
Externí odkaz:
http://arxiv.org/abs/0804.2409
Publikováno v:
Phys. Rev. Lett. 98, 156802 (2007)
We study the multifractality (MF) of critical wave functions at boundaries and corners at the metal-insulator transition (MIT) for noninteracting electrons in the two-dimensional (2D) spin-orbit (symplectic) universality class. We find that the MF ex
Externí odkaz:
http://arxiv.org/abs/cond-mat/0609161
Autor:
Obuse, H., Yakubo, K.
Publikováno v:
J. Phys. Soc. Jpn. Suppl. 74, 242 (2005)
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 analysis
Externí odkaz:
http://arxiv.org/abs/cond-mat/0411628
Autor:
Obuse, H., Yakubo, K.
Publikováno v:
Phys. Rev. B 69, 125301 (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 them,
Externí odkaz:
http://arxiv.org/abs/cond-mat/0405470
Autor:
Obuse, H., Yakubo, K.
Publikováno v:
Phys. Rev. B 71, 035102 (2005)
We study the level-spacing distribution function $P(s)$ 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 $P(s)$ fo
Externí odkaz:
http://arxiv.org/abs/cond-mat/0405429
Autor:
Obuse, H., Yakubo, K.
Publikováno v:
J. Phys. Soc. Jpn. 73, 2164 (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, t
Externí odkaz:
http://arxiv.org/abs/cond-mat/0405387
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