Many body interactions may modify the topology of physical systems. We have discussed it for a simple 0-D system with non-hermitian hamiltonian. Have a look at our recent paper, "Correlation effects o...

Our paper on non-real things has been picked up by JPS Hot Topics. It's real.

Motivated by the relation between the Dirac/Schrodinger hamiltonians, the square root topological phase (SRTI) has been discussed in several cases recently. Here the roles of symmetries in SRTI are fo...

Dirac cones are generically tilted when realized in a realistic material. This gapless structure is effectively protected by the generalized chiral symmetry. It induces topological edge states when th...

Zero modes of chiral symmetric systems are stable as for symmetry preserving disorder. On a honeycomb lattice with Kekule ordering, we have demonstrated this stabilities numerically. It has been pubis...

Robustness of the mirror skin effects against for randomness breaking the symmetry is demonstrated by machine learning. The letter has been published in J. Phys. Soc. Jpn. 90, 053703 (2021) by Hiromu ...

Diffusion in non-equilibrium phenomena is typical and universal. Any unbalance away from the equilibrium is always/necessarily relaxed to the steady state. Here non-uniform (periodic) modulation of th...

Bosonic particle pair of  the Creutz ladder become itinerant due to particle-particle interaction although its one particle spectrum is completely flat implying localized in real space. Then modulatio...