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初貝 安弘
筑波大学
数理物質系物理学域長
筑波大学大学院
数理物質科学研究科
物理学専攻 教授
物理学専攻長
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ニュース!! : Entanglement Chern numbers in 3D
投稿者 : hatsugai 投稿日時: 2017-10-06 16:36:02 (515 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.


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今年もやります。まずは量子力学3. 冬は 統計力学2. 平成30年の新年あけましておめでとうございます。今年もあと21日!
最新ニュース
投稿者 : hatsugai 投稿日時: 2018-12-06 22:57:18 (64 ヒット)

Yuji Matsuda (Kyoto Univ.) will be telling us about their discoveries on Dec. 14 entitled as "Majorana fermions and half-integer thermal quantum Hall effect in a quantum spin liquid". Its detail is here. Join us !


投稿者 : hatsugai 投稿日時: 2018-12-05 17:03:35 (14 ヒット)

Nobuyuki Okuma (Kyoto Univ.) will tell us in a long seminar entitled as "Real-Space Topological Classification: Higher-order topology and Atiyah-Hirzebruch spectral sequence" on Dec.19. The detail is here. Join us.


投稿者 : hatsugai 投稿日時: 2018-11-12 17:21:21 (132 ヒット)

Shutaro Sumita (Kyoto Univ.) will talk on "Classification of topological crystalline superconducting nodes on high-symmetry axis" on Nov. 28. The detail is here. Join us.


投稿者 : hatsugai 投稿日時: 2018-11-06 11:31:20 (143 ヒット)

We will organize an international workshop : Variety and universality of bulk-edge correspondence 2018X (BEC2018X) , Dec.9-Dec.13 (2018) Tokyo Campus, Univ. Tsukuba. The registration is open for oral/poster contribution. Please visit the site. We also welcome participation without presentation (still please register). It is free.


投稿者 : hatsugai 投稿日時: 2018-10-03 15:59:27 (230 ヒット)

We will co-organize “Trends in Theory of Correlated Materials (TTCM 2018), Oct. 8-10 (2018), Geneva. Visit the site ! It's a continuation of successful bilateral workshops between Japan and Swiss.


    検索
    バルク・エッジ対応
    [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]
    トポロジカル相
    [0]昔の科研費
    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
    私の講演ファイルのいくつか
    [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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