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

2009/01/30 by B. Wang, Han-Dong Chen, S. Das Sarma · 3 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #Quantum many-body systems #cond-mat.str-el #quant-ph

paper · pdf · doi:10.1103/physreva.79.051604

published as Phys. Rev. A 79, 051604(R) (2009)

arxiv created 2009/01/30 · openalex publication_date 2009/05/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

With a recently developed time-evolving block decimation algorithm, we numerically study the ground-state quantum phase diagram of Fermi mixtures with attractive interspecies interactions loaded in one-dimensional optical lattices. For our study, we adopt a general asymmetric Hubbard model 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.

Citations

• Fulde-Ferrell-Larkin-Ovchinnikov pairing in one-dimensional optical lattices
• Efficient Simulation of One-Dimensional Quantum Many-Body Systems
• Phase Diagram of a Strongly Interacting Polarized Fermi Gas in One Dimension
• Finite-temperature phase diagram of trapped Fermi gases with population imbalance
• Density-Matrix Renormalization Group Study of Trapped Imbalanced Fermi Condensates

Cited by

• Phase separation and pairing regimes in the one-dimensional asymmetric Hubbard model
• Phase separation of trapped spin-imbalanced Fermi gases in one-dimensional optical lattices
• Ground states and dynamics of population-imbalanced Fermi condensates in one dimension