732 citations · 3.5k across the 122 of their papers we have counts for
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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…
Finite Temperature Phase Transitions in the SU Hubbard model
Hiromasa Yanatori, Akihisa Koga
We investigate the SU() Hubbard model for the multi-component fermionic optical lattice system, combining dynamical mean-field theory with the continuous-time quantum Monte Carl…
Finite Temperature Properties of Three-Component Fermion Systems in Optical Lattice
Hiromasa Yanatori, Akihisa Koga
We investigate finite temperature properties in the half-filled three-component (colors) fermion systems. It is clarified that a color density-wave (CDW) state is more stable than…
Stability of the Superfluid State in Three-Component Fermionic Optical Lattice Systems
Yuki Okanami, Nayuta Takemori, Akihisa Koga
Three-component fermionic optical lattice systems are investigated in dynamical mean-field theory for the Hubbard model. Solving the effective impurity model by means of continuous…
Supersolid states in a hard-core Bose-Hubbard model on a layered triangular lattice
Ryota Suzuki, Akihisa Koga
We study ground-state properties in a hard-core Bose-Hubbard model on a layered triangular lattice. Combining cluster mean-field theory with the density matrix renormalization grou…
Cluster mean-field approach with density matrix renormalization group: Application to the hard-core bosonic Hubbard model on a triangular lattice
Ryota Suzuki, Akihisa Koga
We introduce a new numerical method for the solution of self-consistent equations in the cluster mean-field theory. The method uses the density matrix renormalization group method…