Quantum phase diagram of fermion mixtures with population imbalance in one-dimensional optical lattices
arXiv:0901.4896 · doi:10.1103/PhysRevA.79.051604
Abstract
With a recently developed time evolving block decimation (TEBD) algorithm, we numerically study the ground state quantum phase diagram of fermi mixtures with attractive inter-species interactions loaded in one-dimensional optical lattices. For our study, we adopt a general asymmetric Hubbard model (AHM) with species-dependent tunneling rates to incorporate the possibility of mass imbalance in the mixtures. We find clear signatures for the existence of a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase in this model in the presence of population imbalance. Our simulation also reveals that in the presence of mass imbalance, the parameter space for FFLO states shrinks or even completely vanishes depending on the strength of the attractive interaction and the degree of mass imbalance.
References in corpus (14)
- Color superconductivity in dense quark matter
- Exploring an ultracold Fermi-Fermi mixture: Interspecies Feshbach resonances and scattering properties of 6Li and 40K
- Phase diagram of a strongly interacting polarized Fermi gas in one dimension
- Pairing states of a polarized Fermi gas trapped in a one-dimensional optical lattice
- Fulde-Ferrell-Larkin-Ovchinnikov superfluidity in one-dimensional optical lattices
- Density-Matrix Renormalization Group Study of Trapped Imbalanced Fermi Condensates
- The FFLO state in the one-dimensional attractive Hubbard model and its fingerprint in the spatial noise correlations
- Diatomic molecules in ultracold Fermi gases - Novel composite bosons
- Spin-1/2 fermions on spin-dependent optical lattices
- Crystalline phase of strongly interacting Fermi mixtures
- Pair correlations of a spin-imbalanced Fermi gas on two-leg ladders
- Polarized superfluidity in the attractive Hubbard model with population imbalance
- Spectral properties of a partially spin-polarized one-dimensional Hubbard/Luttinger superfluid
- Finite temperature phase diagram of trapped Fermi gases with population imbalance