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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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"Physics of the bulk-edge correspondence :its diversity and universality"
Focused lectures at the Chiba University, organized by Prof. T. Nakayama
2015. July8-9
Content of the lectures (pdf files are mostly in English)
1. Introduction: [Talk file pdf]
2. Quantum Hall effects: [Talk file pdf]
♫ Gauge invariance and Laughlin argument: [Detail pdf]
3. Electronic structue of silicene: [Talk file pdf]
4. Berry phases & Chern number (their quantization): [Talk file pdf]
5. Symmetry protection for topological phases: [Talk file pdf]
6. Bulk-edge correspondence: [Talk file pdf]
Physics of bulk-edge correspondence: Focus lecture at Hiroshima Univ. June 27-29 (2012)
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Focus lecture

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Year 2013
A HAPPY NEW YEAR 2017, 99 days left this year !
Recent News
Poster : hatsugai on 2017-08-17 17:01:30 (201 reads)

We have two opening positions for assistant professors (Hatsugai group). [Details]

Poster : hatsugai on 2017-08-17 17:00:09 (86 reads)

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

Poster : hatsugai on 2017-08-03 13:38:17 (142 reads)

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.

Poster : hatsugai on 2017-06-23 18:52:34 (227 reads)

Japanese article on topological phases, Sorry

Poster : hatsugai on 2017-04-21 19:57:50 (228 reads)

数理科学5 月号(2017年)に「物理学における線形代数:量子力学での展開」として小話を3つ書きました。1.量子もつれ, 2.平坦バンド, 3. ベリー接続としての単磁極.興味のある方はご覧ください.「物理学と数学のつながり」数理科学 5月号Only in Japanese

    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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