Quantum phase diagram of fermion mixtures with population imbalance in one-dimensional optical lattices

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.

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• Spin-1/2 fermions on spin-dependent optical lattices
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• Crystalline phase of strongly interacting Fermi mixtures
• FFLO state in 1, 2, and 3 dimensional optical lattices combined with a non-uniform background potential
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• 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

Cited by in corpus (9)

• All-optical production of a degenerate mixture of 6Li and 40K and creation of heteronuclear molecules
• Dimer, trimer and FFLO liquids in mass- and spin-imbalanced trapped binary mixtures in one dimension
• Multimer formation in 1D two-component gases and trimer phase in the asymmetric attractive Hubbard model
• Interaction quantum quenches in the one-dimensional Fermi-Hubbard model with spin imbalance
• Ground states and dynamics of population-imbalanced Fermi condensates in one dimension
• Pairing patterns in one-dimensional spin- and mass-imbalanced Fermi gases
• Quantum Coherent States of Interacting Bose-Fermi Mixtures in One Dimension
• Interplay of mass imbalance and frustration in correlated band insulators
• Resonant superfluidity in the Rabi-coupled spin-dependent Fermi-Hubbard model