13 citations · 23 across the 5 of their papers we have counts for
5 papers
Nonequilibrium phase transition of dissipative fermionic superfluids: Case study of multi-terminal Josephson junctions
Soma Takemori, Kazuki Yamamoto
We investigate nonequilibrium dynamics of a triad of fermionic superfluids connected via Josephson junctions, following sudden switch-on of two-body loss in one of the three superf…
Dimensionality effect on exceptional fermionic superfluidity with spin-dependent asymmetric hopping
Soma Takemori, Kazuki Yamamoto, Akihisa Koga
Non-Hermitian (NH) quantum systems host exceptional points (EPs), where eigenstates and eigenvalues coalesce, leading to unconventional many-body phenomena absent in Hermitian syst…
Spin-Depairing-Induced Exceptional Fermionic Superfluidity
Soma Takemori, Kazuki Yamamoto, Akihisa Koga
We investigate the non-Hermitian (NH) attractive Hubbard model with spin depairing, which is a spin-resolved asymmetric hopping that nonreciprocally operates spins in the opposite…
Phase diagram of non-Hermitian BCS superfluids in a dissipative asymmetric Hubbard model
Soma Takemori, Kazuki Yamamoto, Akihisa Koga
We investigate the non-Hermitian (NH) attractive Fermi-Hubbard model with asymmetric hopping and complex-valued interactions, which can be realized by collective one-body loss and…
Theory of non-Hermitian fermionic superfluidity on a honeycomb lattice: Interplay between exceptional manifolds and van Hove Singularity
Soma Takemori, Kazuki Yamamoto, Akihisa Koga
We study the non-Hermitian fermionic superfluidity subject to dissipation of Cooper pairs on a honeycomb lattice, for which we analyze the attractive Hubbard model with a complex-v…