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[再公募]   Job opening for 1 assistant professor (theory of topological phases, maximum 3-year term (until March 31 2022), paid by KAKEN-HI, "Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts", It's detail:[LINK]  
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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)
S. Nakajima (Kyoto Univ.)
Project Researchers (appointed order)
Tomonari Mizoguchi (Assistant professor, Univ. of Tsukuba) : March 1, 2018-Dec.31, 2018 (Moved to tenure track assistant professor from Jan.1, 2019)
Hideaki Iwasawa (Program-specific associate professor, Hiroshima Univ.) : June.1, 2018-
Nobuyuki Takei (Program-specific associate professor, Kyoto Univ.) : Sep.1, 2018-
Yoshihito Kuno (Assistant professor, Univ. of Tsukuba) : March 1, 2020-

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)
program
2. International workshop : Variety and universality of bulk-edge correspondence 2018 (BEC2018), Jan.4-Jan.8 (2018)
73 registered participants.
3. 3rd Informal workshop, May 19-20 (2018)
Univ. Tsukuba, Tsukuba
4. International workshop : Variety and universality of bulk-edge correspondence 2018X (BEC2018X) , Dec.9-Dec.13 (2018)
Tokyo Campus, Univ. Tsukuba, Myogadani, Tokyo
5. NTTI2019 & BEC 2019 at Hiroshima, July 14-19 (2019): International workshop : Variety and universality of bulk-edge correspondence 2019 (BEC2019) jointed with "New Trends in Topological Insulators 2019 (NTTI2019)"
6. International workshop : Variety and universality of bulk-edge correspondence in topological phases:From solid state physics to transdisciplinary concepts" (BE/BC2020F, Bulk-Edge/Boundary Correspondence), Feb. 28-29 (2020)
Tokyo Campus, Univ. Tsukuba, Myogadani, Tokyo : Due to the Corona-virus outbreak in Japan, the real meeting is canceled and made "virtual".

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. August 2019: Open position for assistant professor (Univ. of Tsukuba) : Decided. Dr. Yoshihito Kuno. Thank you for the applications.
General articles
1. Japansese only
2. Japansese only
3. Only in Japanese
4. Japanese only
5. Japanese only
6. Japanese only
7. Japanese only
8. Japanese only
9.

★ For specialists
1. Bulk-edge correspondence
2. Japanese article

★ Focus lecture
Kyushu Univ. (supported by the present project)
Chiba Univ.(2015), Hiroshima Univ.2012) (before the project)

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Recent News
Poster : hatsugai on 2020-06-18 07:34:20 (69 reads)

Linear electric circuits are one more non-quantum platform of the topological phenomena such as bulk-edge correspondence we have been working around. Then its non-hermitian extension with/without symmetry is surely of the important targets. We have here discussed mirror skin effects of the non-hermitian electric circuit where the boundary states dominate on the mirror symmetric lines. Also possible realization is proposed. Have a look at "Mirror skin effect and its electric circuit simulation" by Tsuneya Yoshida, Tomonari Mizoguchi, and Yasuhiro Hatsugai, Phys. Rev. Research 2, 022062(R) (2020) (Open access).


Poster : hatsugai on 2020-06-09 12:11:19 (89 reads)

We have been proposing a systematic construction scheme of flat bands by molecular orbitals (MO). Now it is extended for systems with non trivial topology where non trivial bands with non zero Chern numer may cross the flat bands although the Chern number of the flat band itself is vanishing. We have presented a various other examples such as the Haldane model and the Kane-Mele model of the MOs'. Have a look at Systematic construction of topological flat-band models by molecular-orbital representation" by Tomonari Mizoguchi and Yasuhiro Hatsugai, Phys. Rev. B 101, 235125 (2020) also arXiv:2001.10255.


Poster : hatsugai on 2020-03-15 00:55:42 (272 reads)

Topological phases are everywhere. Higher order topological phases are realized in a spring mass model on a Kagome lattice. Berry phases quantized in a unit of 2π/3 predict localized vibration modes near the corner of the system. This quantization is due to a symmetry protection. Have a look at our paper in Physical Review B. Most of the topological phenomena are realized in a mechanical analogue, which are much accessible without any real high-tech. Of course, it is still a non-trivial task.


Poster : hatsugai on 2020-02-26 09:17:33 (402 reads)

Pierre Delplace (Laboratoire de Physique, École Normale Supérieure de Lyon, France) will be telling us on his series of works as a title "Topological waves from condensed matter to the atmosphere". Audience from various area is welcome such as physics and geophysics. The talk is from 14:00 Feb. 27 (2020) at B118. See details in pdf. Join us.


Poster : hatsugai on 2020-01-15 01:17:36 (520 reads)

ZQ Berry phase, that is quantized due to symmetry, is defined and used successfully for characterization of 2D/3D higher order topological phases with/without interaction. Both for spins and fermions. The article by Hiromu Araki, Tomonari Mizoguchi and Yasuhiro Hatsugai has been published in Physical Review Research. Also it is highlighted here as one of the Rapid Communications. Have a look at !


    Search
    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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