13 citations · 33 across the 11 of their papers we have counts for
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Localized states of the non-Hermitian Schr{ö}dinger equation with a complex potential: from Efimov states to bipolarons
Kyoka Tsunoda, Kazuki Yamamoto, Shimpei Endo
We study the non-Hermitian Schrödinger equation with a complex potential, which bridges Hermitian few-body and non-Hermitian many-body physics: a real attractive potentia…
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…
Correlation versus dissipation in a non-Hermitian Anderson impurity model
Kazuki Yamamoto, Masaya Nakagawa, Norio Kawakami
We analyze the competition between strong correlations and dissipation in quantum impurity systems from the Kondo regime to the valence fluctuation regime by developing a slave-bos…
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…