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Who am I ?
Yasuhiro Hatsugai
Associate Provost (School of Science and Engineering)

Professor of Physics
Division of Physics
Faculty of Pure and Applied Sciences
TIMS Member
University of Tsukuba
1-1-1 Tennodai, Tsukuba
Ibaraki 305-8571 JAPAN
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Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts
Grant-in-Aid for Scientific Research (S) Project No.17H06138
May 31, 2017 - March 31, 2022
♥ Public information
Project leader :
Y. Hatsugai (Univ. Tsukuba)
Core Member (alphabetical) :
H. Aoki (Univ. Tokyo)
T. Fukui (Ibaragi Univ.)
 S. Iwamoto, (Univ. Tokyo )
T. Kawarabayashi (Toho Univ.)
A. Kimura (Hiroshima Univ.)
Y. Takahashi (Kyoto Univ.)
Adjunct Member (alphabetical):
M. Furuta (Univ. Tokyo)
 K. Imura, (Hiroshima Univ. )
T. Kariyado (NIMS)
J. Kobayashi (Kyoto Univ.)
S. Nakajima (Kyoto Univ.)

Related project
"Physics of bulk-edge correspondence and its universality in topological phases: From solid state physics to cold atoms" (FY2014-FY 2016)

♣ Meeting
1. Start-up Meeting
Univ. Tsukuba, Meyogadani, Bunkyo-ku, Tokyo, June 25 (2017)
2. International workshop : Variety and universality of bulk-edge correspondence 2018 (BEC2018) , Jan.4-Jan.8 (2018)
73 registered participants.

BEC Seminar

♦ Job opening
1. Open position for assistant professor: Theory of topological phases (Univ. of Tsukuba) : Decided. Dr. Mizoguchi Tomonari. Thank you for the applications.
2. 特定助教または特定准教授公募 冷却原子を用いたトポロジカル物理に関する実験的研究(京都大学)
★ General articles
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★ For specialists
Bulk-edge correspondence

VI. Physics of bulk-edge correspondence and its universality in topological phases: From solid state physics to cold atoms (FInished) April 2014 - March 2017
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Recent News
Poster : hatsugai on 2017-12-26 01:33:43 (220 reads)

Poster : hatsugai on 2017-12-22 19:52:51 (203 reads)

Michel Fruchart (Instituut-Lorentz Universiteit, Leiden) will give a talk on Jan.9 (2018), 10:30 am at Rm. B602 by the title Topology of effective evolutions: oriented scattering networks and the phase rotation symmetry

Poster : hatsugai on 2017-12-22 11:33:02 (195 reads)

Christopher Mudry (Paul Scherrer Institute, Switzerland) gives a talk by the title "Abelian topological order in three-dimensional space" at Rm. B602 from 14:00 on Dec.28, (2017). The detail is here

Poster : hatsugai on 2017-11-27 18:03:29 (460 reads)

We are organizing an "International workshop : Variety and universality of bulk-edge correspondence 2018 (BEC2018) . Please do not confuse with Bose-Einstein condensation :) Its program is ready.

Poster : hatsugai on 2017-10-06 16:36:02 (260 reads)

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.

    Bulk-edge correspondence
    [0] バルクとエッジ
    [1] Focus lecture
    [2] Original papers
    [3] Japanese Physical Society monthly issue Commentary (Only Japanese except abstract) [pdf]
    [4] "Band gap, dangling bond and spin : a physicist's viewpoint" [pdf]
    Topological phases
    [0]Historical project
    KAKEN-HI DB FY1992 : Topological effects in electronic/spin systems
    KAKEN-HI DB FY1994 : Topology & geometrical phases in condensed matter physics
    Some of my talk files
    [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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