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初貝 安弘
物理学専攻 教授
会議 & 研究会
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ResercherID: Y. Hatsugai

[1] 特定研究領域「フラストレーションが創る新しい物性」平成21年度領域成果報告会
1/7~1/9 京都大学基礎物理学研究所 パナソニックホール 京都府
[2] International Symposium on Physics of New Quantum Phases in Superclean Materials (PSM2010)
3/9~3/12 at Hamagin Hall "VIA MARE", Yokohama
[3] 日本物理学会 第65回年次大会 岡山大学
3/22 棚谷翔, 丸山勲, 有川晃弘, 初貝安弘, "2次元直交ダイマー系におけるZ_2ベリー位相" 22pEH-11
[4] American Physical Society March Meeting
3/16~3/19 Oregon convention center, Portland
[5]The international conference Highly Frustrated Magnetism 2010
8/1~8/6 at the Homewood campus of the Johns Hopkins University in Baltimore, Maryland
poster presentation "Topological characterization of 2D orthogonal dimer model"
[6]日本物理学会 2010年秋季大会 大阪府立大学
9/25 棚谷翔, 有川晃弘, 丸山勲, 初貝安弘,"S=1/2 2次元パイロクロア格子におけるZ_2 ベリー位相"25aTe-12
[7] 第4回物性科学領域横断研究会 11/13~15
ポスター発表"二次元パイロクロア格子上のS=1/2 ハイゼンベルグ模型に対するZ2 ベリー位相を用いた相同定"
[8] アメリカ研修 Jan.-May, 2011
College of Nanoscale Science and Engineeriing (CNSE) State University of New York, Albany, New York, USA


今年もやります。まずは量子力学3. 冬は 統計力学2. 平成29年の新年あけましておめでとうございます。今年もあと17日!
投稿者 : hatsugai 投稿日時: 2017-11-27 18:03:29 (55 ヒット)

We are organizing an "International workshop : Variety and universality of bulk-edge correspondence 2018 (BEC2018) . Please do not confuse with Bose-Einstein condensation :) We welcome registration and have still several slots for presentation. Please visit the site.

投稿者 : hatsugai 投稿日時: 2017-10-06 16:36:02 (105 ヒット)

The entanglement Chern numbers is a Chern number of an entanglement Hamiltonian which characterizes topological properties of a topological phase. Starting from a pure state density matrix of the ground state, one may obtain finite temperature (mixed state) density matrix by tracing out parts of the system. If the entanglement hamiltonian has a finite energy gap, the Chern number is well defined by lowering the temperature. We apply the concept for the 3D topological phases.The parity of the number of the Weyl point gives a well defined topological number to distinguish the the state is topologically non trivial. Have a look at arXiv 1708.03722 . The paper has been accepted for publication in Physical Review B.

投稿者 : hatsugai 投稿日時: 2017-08-17 17:01:30 (342 ヒット)

初貝研究室では今回助教2名を公募いたします(公募締め切り2017年9月15日)。委細は [助教公募] をご確認ください。適任者のご推薦、ご応募の方よろしくお願いいたします。

投稿者 : hatsugai 投稿日時: 2017-08-17 17:00:09 (379 ヒット)

We are organizing a Japan-Swiss workshop TTCM2017 at EPOCHAL Tsukuba, Sep.10-13 (2017). Limited number of posters will be still accepted.

投稿者 : hatsugai 投稿日時: 2017-08-03 13:38:17 (323 ヒット)

A numerical scheme to calculate the many body Chern number for a ground state multiplet is formulated and explicitly given for projected bands of any lattice. We demonstrate its validity for lattice analogue of the nu=1/3 and 1/2 states. The string gauge to realize the minimum flux compatible with the periodicity of the unit cell is also presented. [arXiv:1707.06722]. The paper is published in JPSJ lett.

    [0] バルクとエッジ
    [1] 集中講義
    [2] 原論文と解説
    [3] トポロジカル秩序とベリー接続:日本物理学会誌 「解説」 [JPS-HP] [pdf]
    [4] "Band gap, dangling bond and spin : a physicist's viewpoint" [pdf] [Web]
    科研費 1992年度:電子系スピン系におけるトポロジカル効果
    科研費 1994年度:物性論におけるトポロジーと幾何学的位相
    [1] MIT, Boston (2003)
    [2] APS/JPS March Meeting (2004)
    [3] JPS Fall meeting, JAPAN (2004)
    [4] APS/JPS March meeting (2005)
    [5] JPS Fall meeting (2005):Entanglement
    [6] Superclean workshop, Nasu (2006)
    [7] MPIPKS, Dresden (2006)
    [8] KEK, Tsukuba (2007)
    [9] ETH, Zurich (2008)
    [10] ICREA, Sant Benet (2009)
    [11] JPS Meeting, Kumamoto (2009)
    [12]HMF19, Fukuoka (2010)
    [13] NTU, Singapore (2011)
    [14] ICTP, Trieste (2011)
    [15] Villa conf., Orland (2012)
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