Quasi-one-dimensional polarized Fermi superfluids

Abstract

We calculate the zero temperature phase diagram of a polarized two-component Fermi gas in an array of weakly-coupled parallel one-dimensional (1D) 'tubes' produced by a two-dimensional optical lattice. Increasing the lattice strength drives a crossover from three-dimensional (3D) to 1D behavior, stabilizing the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) modulated superfluid phase. We argue that the most promising regime for observing the FFLO phase is in the quasi-1D regime, where the atomic motion is largely 1D but there is weak tunneling in the other directions that stabilizes long range order. In the FFLO phase, we describe a phase transition where the quasiparticle spectrum changes from gapless near the 3D regime to gapped in quasi-1D.

4+ pages, 2 figures. References added and minor changes to text

References in corpus (6)

• Deformation of a Trapped Fermi Gas with Unequal Spin Populations
• Phase diagram of a strongly interacting polarized Fermi gas in one dimension
• BEC-BCS crossover, phase transitions and phase separation in polarized resonantly-paired superfluids
• Pairing without Superfluidity: The Ground State of an Imbalanced Fermi Mixture
• Finite temperature phase diagram of a polarized Fermi gas in an optical lattice
• Larkin-Ovchinnikov state in resonant Fermi gas

Cited by in corpus (16)

• Fulde-Ferrell-Larkin-Ovchinnikov superfluidity in one-dimensional optical lattices
• Exact quantum Monte Carlo study of one dimensional trapped fermions with attractive contact interactions
• The FFLO state in the one-dimensional attractive Hubbard model and its fingerprint in the spatial noise correlations
• Theory of quasi-one dimensional imbalanced Fermi gases
• FFLO state in 1, 2, and 3 dimensional optical lattices combined with a non-uniform background potential
• Finite temperature phase diagram of a spin-polarized ultracold Fermi gas in a highly elongated harmonic trap
• Quantum phase diagram of fermion mixtures with population imbalance in one-dimensional optical lattices
• Pair correlations of a spin-imbalanced Fermi gas on two-leg ladders
• Signature of the FFLO phase in the collective modes of a trapped ultracold Fermi gas
• Magnetic ordering and quantum statistical effects in strongly repulsive Fermi-Fermi and Bose-Fermi mixtures
• Interferometric probe of paired states
• Magnetism and quantum phase transitions in spin-1/2 attractive fermions with polarization
• Noise correlations of the ultra-cold Fermi gas in an optical lattice
• Spatially-modulated Superfluid States in Fermionic Optical Ladder Systems with Repulsive Interactions
• Suppression or enhancement of the Fulde-Ferrell-Larkin-Ovchinnikov order in a one-dimensional optical lattice with particle correlated tunnelling
• Effects of boundaries and density inhomogeneity on states of vortex matter in Bose--Einstein condensates at finite temperature