Ultra-cold Fermi gases with resonant dipole-dipole interaction

Abstract

The superfluid phases in the resonant dipolar Fermi gases are investigated by the standard mean-field theory. In contrast to the crossover from Bose-Einstein condensation (BEC) to Bardeen-Cooper-Schrieffer (BCS) superfluid in the Fermi gases with the isotropic interactions, the resonant dipolar interaction leads to two completely different BEC phases of the tight-binding Fermi molecules on both sides of the resonance, which are characterized by two order parameters with the distinct internal symmetries. We point that near the resonance, the two competitive phases can coexist, and an emergent relative phase between the two order parameters spontaneously breaks the time-reversal symmetry, which could be observed in the momentum resolved rf-spectroscopy.

arXiv comment5 pages, 3 figures

References in corpus (37)

• Topological insulators and superconductors
• Feshbach Resonances in Ultracold Gases
• Atomic Scattering in Presence of an External Confinement and a Gas of Impenetrable Bosons
• A High Phase-Space-Density Gas of Polar Molecules
• Observation of resonance condensation of fermionic atom pairs
• Vortices and Superfluidity in a Strongly Interacting Fermi Gas
• Nematic Fermi Fluids in Condensed Matter Physics
• Formation of ultracold polar molecules in the rovibrational ground state
• Using photoemission spectroscopy to probe a strongly interacting Fermi gas
• Trapped atomic condensates with anisotropic interactions
• Observation of pseudogap behavior in a strongly interacting Fermi gas
• Trapped condensates of atoms with dipole interactions
• Trapping ultracold dysprosium: a highly magnetic gas for dipolar physics
• Ultracold Fermionic Feshbach Molecules of ${}^{23}$Na${}^{40}$K
• Controlling atom-atom interaction at ultralow temperatures by dc electric fields
• Superfluid pairing in a polarized dipolar Fermi gas
• Phase space deformation of a trapped dipolar Fermi gas
• Fermion Superfluids of Non-Zero Orbital Angular Momentum near Resonance
• Prospects for p-wave paired BCS states of fermionic atoms
• Superfluidity of trapped dipolar Fermi gases
• Evolution from BCS to BEC superfluidity in p-wave Fermi gases
• Ferro-Nematic ground state of the dilute dipolar Fermi gas
• Anisotropic Fermi liquid theory of the ultra cold fermionic polar molecules: Landau parameters and collective modes
• Anisotropic pseudo-potential for polarized dilute quantum gases
• Dynamical properties of dipolar Fermi gases
• Zero Sound in Dipolar Fermi Gases
• Mixed triplet and singlet pairing in multicomponent ultracold fermion systems with dipolar interactions
• Hartree-Fock-Bogoliubov Theory of Dipolar Fermi Gases
• Singlet and triplet BCS pairs in a gas of two-species fermionic polar molecules
• Low-energy resonances and bound states of aligned bosonic and fermionic dipoles
• Fermi surface of a trapped dipolar Fermi gas
• An effective many-body theory for strongly interacting polar molecules
• Nonuniform mixed-parity superfluid state in Fermi gases
• s-Wave Scattering Resonances Induced by Dipolar Interactions of Polar Molecules
• Dynamical properties of a trapped dipolar Fermi gas at finite temperature
• Phase transition from a $d_{x^2-y^2}$ to $d_{x^2-y^2}+d_{xy}$ superconductor
• Mixing of $d_{x^2-y^2}$ and $d_{xy}$ superconducting states for different filling and temperature

Cited by in corpus (12)

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• Effective potential and superfluidity of microwave-dressed polar molecules
• Tuning between singlet, triplet, and mixed pairing states in an extended Hubbard chain
• Fermion Pairing across a Dipolar Interaction Induced Resonance
• Quasi-One-Dimensional Dipolar Quantum Gases
• Observing dipolar confinement-induced resonances in waveguides
• Unconventional symmetries of Fermi liquid and Cooper pairing properties with electric and magnetic dipolar fermions
• Reentrant Superfluidity and Pair Density Wave in Single Component Dipolar Fermi Gases
• Multipolar Fermi-surface deformation in a Rydberg-dressed Fermi gas with long-range anisotropic interactions
• Exact two-body solutions and Quantum defect theory of two dimensional dipolar quantum gas
• Leggett mode in a two-component Fermi gas with dipolar interactions