アクセス数 Since 2009
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会議 & 研究会
ResercherID: Y. Hatsugai
投稿者 : hatsugai 投稿日時： 2014-08-19 13:29:55 (130 ヒット)
Takahiro Fukui and I have put a new paper "Entanglement Chern number for an extensive partition of a topological ground state" on the net. It can be a useful tool for several topological phases where conventional Chern numbers are trivial due to some symmetrical constraints. [arXiv]
投稿者 : hatsugai 投稿日時： 2014-08-06 13:13:14 (281 ヒット)
Our recent paper with Toshikaze Kariyado is accepted for publication in Phys. Rev. B where the bulk-edge correspondence is discussed with the Berry connections and adiabatic continuation. As an example, lattice Dirac fermions with 1/4 filling are described with several types of edges where quantized Berry phases in unit of pi/2 is useful. Have a look at [arXiv:1404.4451]
投稿者 : hatsugai 投稿日時： 2014-07-08 18:35:51 (425 ヒット)
Now our paper is published in Phys. Rev. B. It is also on the net arXiv:1403.1648, "Polarization as a topological quantum number in graphene" with Hideo Aok. In the article, one more topological invariant for the Hofstadter problem and graphene is described. Have a look at.