1211.2509 (Keita Kobayashi et al.)

Nontrivial Haldane phase of an atomic two-component Fermi gas trapped in
a 1d optical lattice    [PDF]

Keita Kobayashi, Masahiko Okumura, Yukihiro Ota, Susumu Yamada, Masahiko Machida

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 naturally formed on $p$-band Mott core in a wide range of the strong on-site repulsive interaction. The present proposal is composed of two steps, one of which is theoretical derivation of an effective 1-D S=1 interacting-chain model from the original tight-binding Hamiltonian handling the two $p$-orbitals, and the other of which is numerical demonstration employing the density-matrix renormalization-group for the formation of the Haldane phase on $p$-band Mott core and its associated features in the original tight-binding model with the harmonic trap potential.

View original: http://arxiv.org/abs/1211.2509