Stable Fulde-Ferrell-Larkin-Ovchinnikov pairing states in 2D and 3D optical lattices

Abstract

We present the study of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) pairing states in the $p$-orbital bands in both two and three-dimensional optical lattices. Due to the quasi one-dimensional band structure which arises from the unidirectional hopping of the orthogonal $p$-orbitals, the pairing phase space is not affected by spin imbalance. Furthermore, interactions build up high dimensional phase coherence which stabilizes the FFLO states in 2D and 3D optical lattices in a large parameter regime in phase diagram. These FFLO phases are stable with imposing the inhomogeneous trapping potential. Their entropies are comparable to those of the normal states at finite temperatures.

5 pages

References in corpus (21)

• Flat bands and Wigner crystallization in the honeycomb optical lattice
• Fulde-Ferrell-Larkin-Ovchinnikov State in Heavy Fermion Superconductors
• Evidence for Superfluidity of Ultracold Fermions in an Optical Lattice
• Direct Observation of the Superfluid Phase Transition in Ultracold Fermi Gases
• Orbital superfluidity in the $P$-band of a bipartite optical square lattice
• Deformation of a Trapped Fermi Gas with Unequal Spin Populations
• State preparation and dynamics of ultracold atoms in higher lattice orbitals
• Pairing states of a polarized Fermi gas trapped in a one-dimensional optical lattice
• Quasi-one-dimensional polarized Fermi superfluids
• Orbital ordering and frustration of $p$-band Mott-insulators
• Exact Numerical Study of Pair Formation with Imbalanced Fermion Populations
• The FFLO state in the one-dimensional attractive Hubbard model and its fingerprint in the spatial noise correlations
• Finite temperature phase diagram of a polarized Fermi gas in an optical lattice
• 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
• Quantum anomalous Hall states in the $p$-orbital honeycomb optical lattices
• Incommensurate superfluidity of bosons in a double-well optical lattice
• Spectral signatures of the Fulde-Ferrell-Larkin-Ovchinnikov order parameter in one-dimensional optical lattices
• Realization and Detection of Fulde-Ferrell-Larkin-Ovchinnikov Superfluid Phases in Trapped Atomic Fermion Systems
• Signature of the FFLO phase in the collective modes of a trapped ultracold Fermi gas
• Noise correlations of the ultra-cold Fermi gas in an optical lattice

Cited by in corpus (2)

• Topological Fulde-Ferrell Superfluids of a Spin-Orbit Coupled Fermi Gas
• Lifshitz tricritical point and its relation to the FFLO superconducting state