Recent News
- TTQM2023 Kashiwa
- The Physical Society of Japan, Annual meeting 9/16-9/19 (2023), Tohoku Univ.
- Nontrivial Topology of Nontopological Nonlinear Waves
- Shiro Sakai will tell us on hyperuniformity !
- Heat carrying corner states of breathing Kagome
- Z2× Z2 symmetry and Z4 quantization in bosonic ladders
- Hidenori Fukaya will be telling us on dyon & topological insulators
- Negative index photonic crystal induces non hermitian physics
- Diophantine equation of SU(Q) topological pump
- Funding 2023
- JPS Spring Meeting 2023
- APS March meeting 2023
- Graphene, silicene and martini
- Array of Martini glasses with topology
- Novel critical states in random U(1) MO models in 2D
- Anyon superconductivity revisited : talk by Koji Kudo
- Topological strucure can be fragile against interactions
- Seminar by Tonomari Mizoguchi
- Reduction of non-Hermitian 1D topology with interaction
- TTQM2022
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TTQM2023 Kashiwa
We are organizing TTQM2023 (Trends in the Theory of Quantum Materials) as a continuation of the Japan-Swiss bilateral workshop for mainly theoretical condensed matter physicists. It is at Kashiwa this...
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The Physical Society of Japan, Annual meeting 9/16-9/19 (2023), Tohoku Univ.
Japan Physical Society Annual meeting 9/16-9/19 (2023)
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Nontrivial Topology of Nontopological Nonlinear Waves
I have written an article for JPSJ News & Comments. Have a look at "Nontrivial Topology of Nontopological Nonlinear Waves." See also old ones.
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Shiro Sakai will tell us on hyperuniformity !
Shiri Sakai (CEMS, RIKEN) will be telling us on their recent works on the hyperuniformity and quasi-crystals. It's a new idea. The talk is on Aug. 30 (Wed). See [pdf] for its detail. Come and join us.
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Heat carrying corner states of breathing Kagome
Heat conduction of the breathing Kagome lattice is discussed in relation to the anomalous heat-carrying corner states due to higher-order topology. Especially the use of the effective Hamiltonian for ...
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Z2× Z2 symmetry and Z4 quantization in bosonic ladders
A two-leg ladder is a nice place to discuss Z2× Z2 symmetry with sufficient numerical accuracy. Using a Z4 Berry phases, several phases of bosonic ladders are discussed in relation to the bulk-edge co...
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Hidenori Fukaya will be telling us on dyon & topological insulators
Condensed Matter Seminar June 29 (Thu.) 2023 10:30-11:30 Zoom https://us02web.zoom.us/j/88914003345?pwd=S096bldkZkd6QTNSL2h2WTl3d0RSdz09 Meeting ID: 889 1400 3345 Passcode: 662572 Title:Why monopole b...
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Negative index photonic crystal induces non hermitian physics
An electromagnetic field in a photonic crystal is described by a hermitian eigenvalue problem with an overlap matrix which may not be positive definite if the system is composed of negative index medi...
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Diophantine equation of SU(Q) topological pump
A topological pump of SU(Q) interacting fermions is proposed based on Affleck's SU(Q) quantum chains associated with a symmetric breaking term characterized by a parameter P/Q with co-prime integers P...
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Funding 2023
KAKEN KAKEN DB Yasuhiro Hatsugai Grant-in-Aid for Scientific Research (B): Symmetry and bulk-edge correspondence of strongly correlated systems Project/Area Number: 23H01091 JPY 13,260,000 (Direct Cos...
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JPS Spring Meeting 2023
Meeting site
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APS March meeting 2023
APS March meeting, March 5–10, 2023 | Las Vegas, Nevada March 20–22, 2023 | Virtual
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Graphene, silicene and martini
Chemisorption on graphene and silicene may realize Martini type π-electron network. It implies specific band dispersion. We propose potential materialization by using the molecular orbital constr...
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Array of Martini glasses with topology
Taking a square root is not trivial. The Dirac equation is invented by the square root of the Kleind-Gordon equation. Then the lattice analog of the operation implies non-trivial topology and edge/cor...
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Novel critical states in random U(1) MO models in 2D
Using a molecular orbital (MO) construction scheme of the flat band which we are proposing, we found novel random critical states in a series of flat band systems away from the flat band energy. The M...
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Anyon superconductivity revisited : talk by Koji Kudo
Next Wednesday, Feb. 15 (2023), Koji Kudo (Penn state) visits us and will be telling on anyon superconductivity. The talk is hybrid. [Detail] For the zoom link, contact me (email). Speaker: Koji Kudo...
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Topological strucure can be fragile against interactions
Topological protection of singularities for the non-Hermitian problem is one of the recent focuses in condensed matter physics. Exceptional points and rings with symmetry constraints are typical examp...
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Seminar by Tonomari Mizoguchi
Coming Wed. afternoon, 13:00, Dec.14, Tomonari Mizoguchi (Univ. Tsukuba) will be telling us about his work in collaboration with N. Okuma (Kyoto Univ.). The seminar is in a hybrid format. Please conta...
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Reduction of non-Hermitian 1D topology with interaction
Topological protection for topological systems may change by the inclusion of particle-particle interaction, which is known as "reduction phenomena." Here we have pointed out its possibilities for 1-d...
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