Recent News
- 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
- Bulk-edge correspondence in electric circuits of topological pump
- Localization 2022
- Adiabatic connection with spin
- BEC seminar by Koji Kudo, Aug.10, 2022
- “b 2– 4 ac” formula with rotation symmetry
- Random flatbands are special
- APS March meeting 2022
- Heat escapes fast due to bulk-edge correspondence
- Exact correlation of correlation
- Discriminant and symmetry
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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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Bulk-edge correspondence in electric circuits of topological pump
One of the recent wisdom for topological phases is the use of a classical system as a quantum simulator. The Hofstadter butterfly associated with topological phase transitions is realized in electric ...
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Localization 2022
Localisation 2022 T. Mizoguchi and Y. Hatsugai, "Gap opening and emergent critical states in a random-phase molecular-orbital model", Localisation 2022, Aug.25-30 (2022) T. Kuroda, T. Mizoguchi, and Y...
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Adiabatic connection with spin
Adiabatic connection of the gapped many-body states is a conceptual background of the topological phases. Historical and more than successful examples are given by various fractional quantum Hall stat...
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BEC seminar by Koji Kudo, Aug.10, 2022
On Aug.10 (Wed) 2022 at 11:am Japan time, Koji Kudo at Penn State will be telling us about his recent study by a title : "Exactly solvable model for non-Abelian quasiparticle states." Join us on zoom....
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“b 2– 4 ac” formula with rotation symmetry
The discriminant is a generalization of the "b 2- 4 ac" formula that everybody knows, which tells us the degeneracy of the (secular) equation. Then it is natural the discriminant is useful for the stu...
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Random flatbands are special
Recent wisdom for the construction of flat bands is applicable even with randomness. Characterization of special features of the random flat bands has been successfully done by using machine learning....
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APS March meeting 2022
APS March meeting, March 14-18 2022, Chicago USA
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Heat escapes fast due to bulk-edge correspondence
Analyzing a diffusion equation of alternative metals, rapid heat conduction to the heat bath due to edge states is predicted. The edge states are predicted by the bulk topological invariant as a typic...
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Exact correlation of correlation
Once one admits the electronic state is described by the molecular-orbitals (MOs), the system has flat bands when the number of MOs is less than the total number of atoms. Then it is natural the elect...
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Discriminant and symmetry
As widely accepted, the degeneracy of eigenvalues of the Hamiltonian is a singular point, which is the source of the non-trivial topology. Then it is more than natural that the discriminant of the sec...
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