79 citations · 213 across the 12 of their papers we have counts for
12 papers
Emergence of -pairing ground-state in population-imbalanced attractive Fermi-gases filling orbitals on 1-D optical lattice
Keita Kobayashi, Yukihiro Ota, Masahiko Okumura +2
We explore the ground states in population-imbalanced attractive 1-D fermionic optical lattice filling orbitals over the lowest one by using the density-matrix-renormalizat…
Superconductivity in repulsively interacting fermions on a diamond chain: flat-band induced pairing
Keita Kobayashi, Masahiko Okumura, Susumu Yamada +2
To explore whether a flat-band system can accommodate superconductivity, we consider repulsively interacting fermions on the diamond chain, a simplest quasi-one-dimensional system…
Quantum phases in -orbital degenerated attractive 1D fermionic optical lattices
Keita Kobayashi, Yukihiro Ota, Masahiko Okumura +2
We examine quantum phases emerged by double degeneracy of -orbital bands in attractive atomic Fermi gases loaded on a 1D optical lattice. Our numerical simulations by the densit…
Nontrivial Haldane phase of an atomic two-component Fermi gas trapped in a 1d optical lattice
Keita Kobayashi, Masahiko Okumura, Yukihiro Ota +2
We propose how to create a non-trivial Haldane phase in atomic two-component Fermi-gas loaded on one-dimensional (1-D) optical lattice with trap potential. The Haldane phase is nat…
Ground-state properties of the one-dimensional attractive Hubbard model with confinement: a comparative study
Ji-Hong Hu, Jing-Jing Wang, Gao Xianlong +4
We revisit the one-dimensional attractive Hubbard model by using the Bethe-ansatz based density-functional theory and density-matrix renormalization method. The ground-state proper…
Phase-separated Ferromagnetism in Spin-imbalanced Fermi Atoms Loaded on an Optical Ladder: a DMRG study
M. Okumura, S. Yamada, M. Machida +1
We consider repulsively-interacting cold fermionic atoms loaded on an optical ladder lattice in a trapping potential. The density-matrix renormalization-group method is used to num…