Non-local quantum fluctuations and fermionic superfluidity in the imbalanced attractive Hubbard model

Abstract

We study fermionic superfluidity in strongly anisotropic optical lattices with attractive interactions utilizing the cluster DMFT method, and focusing in particular on the role of non-local quantum fluctuations. We show that non-local quantum fluctuations impact the BCS superfluid transition dramatically. Moreover, we show that exotic superfluid states with delicate order parameter structure, such as the Fulde-Ferrell-Larkin-Ovchinnikov phase driven by spin population imbalance, can emerge even in the presence of such strong fluctuations.

5 pages, 3 figures

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• Many-Body Physics with Ultracold Gases
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• Quasi-one-dimensional polarized Fermi superfluids
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• Finite temperature phase diagram of a polarized Fermi gas in an optical lattice
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Cited by in corpus (21)

• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• 1D to 3D Crossover of a Spin-Imbalanced Fermi Gas
• Physics of ultracold Fermi gases revealed by spectroscopies
• A dynamical mean-field theory study of stripe order and d-wave superconductivity in the two-dimensional Hubbard model
• Superfluidity and Density Order in a Bilayer Extended Hubbard Model
• Strong coupling s-wave superconductors in the extreme Pauli limit: I.The breached pair and metastable FFLO phases
• Population imbalanced lattice fermions near the BCS-BEC crossover: I.The breached pair and metastable FFLO phases
• Population imbalanced lattice fermions near the BCS-BEC crossover: II. The FFLO regime and its thermal signatures
• Spin-Imbalanced Pairing and Fermi Surface Deformation in Flat Bands
• Exotic Superfluid Phases in Spin Polarized Systems on Optical Lattices
• Magnetization, d-wave superconductivity and non-Fermi liquid behavior in a crossover from dispersive to flat bands
• Spin and charge dynamics of a quasi-one-dimensional antiferromagnetic metal
• Spin-Imbalanced Fermi Superfluidity in a Lieb Lattice Hubbard Model
• Larkin-Ovchinnikov phases in two-dimensional square lattices
• Fulde-Ferrell-Larkin-Ovchinnikov pairing states of a polarized dipolar Fermi gas trapped in a one-dimensional optical lattice
• Thermal transitions, pseudogap behavior and BCS-BEC crossover in Fermi-Fermi mixtures
• Spin-imbalanced ultracold Fermi gases in a two-dimensional array of tubes
• Dimensionally Induced Phase Transition of the Weakly Interacting Ultracold Bose Gas
• Superfluidity and pairing phenomena in ultracold atomic Fermi gases in one-dimensional optical lattices, Part I: Balanced case
• Anomalous pseudogap in population imbalanced Fermi superfluids
• Temperature tuned Fermi surface topology and segmentation in non-centrosymmetric superconductors