Superfluidity of p-wave and s-wave atomic Fermi gases in optical lattices

Abstract

We consider p-wave pairing of single hyperfine state and s-wave pairing of two hyperfine states ultracold atomic gases trapped in quasi-two-dimensional optical lattices. First, we analyse superfluid properties of p-wave and s-wave symmetries in the strictly weak coupling BCS regime where we discuss the order parameter, chemical potential, critical temperature, atomic compressibility and superfluid density as a function of filling factor for tetragonal and orthorhombic optical lattices. Second, we analyse superfluid properties of p-wave and s-wave superfluids in the evolution from BCS to BEC regime at low temperatures ($T\approx 0$), where we discuss the changes in the quasiparticle excitation spectrum, chemical potential, atomic compressibility, Cooper pair size and momentum distribution as a function of filling factor and interaction strength for tetragonal and orthorhombic optical lattices.

17 pages with 16 figures; To be published in PRB

References in corpus (12)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Observation of Bose-Einstein Condensation of Molecules
• Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
• Fermionic atoms in a 3D optical lattice: Observing Fermi-surfaces, dynamics and interactions
• Probing Pair-Correlated Fermionic Atoms through Correlations in Atom Shot Noise
• Quantum phase transitions across p-wave Feshbach resonance
• P-wave Feshbach resonances of ultra-cold ${}^6$Li
• Feshbach Resonances in Fermionic Lithium-6
• Anisotropic Fermi Superfluid via p-wave Feshbach Resonance
• Fermion Superfluids of Non-Zero Orbital Angular Momentum near Resonance
• BCS-BEC crossover in a gas of Fermi atoms with a p-wave Feshbach resonance
• Quantum Phase Transition in the BCS-to-BEC Evolution of p-wave Fermi Gases

Cited by in corpus (31)

• Evolution from BCS to BEC superfluidity in p-wave Fermi gases
• Effects of spin-orbit coupling on the Berezinskii-Kosterlitz-Thouless transition and the vortex-antivortex structure in two-dimensional Fermi gases
• Creating p-wave superfluids and topological excitations in optical lattices
• Nonzero orbital angular momentum superfluidity in ultracold Fermi gases
• Novel $p$-wave superfluids of fermionic polar molecules
• Radiofrequency spectroscopy of ${}^6$Li p-wave molecules: towards photoemission spectroscopy of a p-wave superfluid
• The scattering amplitude of ultracold atoms near the p-wave magnetic Feshbach Resonance
• Momentum-space atom correlations in a Mott insulator
• The evolution from BCS to BEC superfluidity in the presence of disorder
• P-wave superfluidity of atomic lattice fermions
• Excitation properties and effects of mass imbalance in the BCS-BEC crossover regime of an ultracold Fermi gas
• Quantum phases of Fermi-Fermi mixtures in optical lattices
• Induced P-wave superfluidity within full energy-momentum dependent Eliashberg approximation in asymmetric dilute Fermi gases
• Hetero pairing and component-dependent pseudogap phenomena in an ultracold Fermi gas with mass imbalance
• Probing two-body exceptional points in open dissipative systems
• Detecting $\pi$-phase superfluids with $p$-wave symmetry in a quasi-1D optical lattice
• Pairing fluctuations and anisotropic pseudogap phenomenon in an ultracold superfluid Fermi gas with plural $p$-wave superfluid phases
• Strong-Coupling and Finite Temperature Effects on $p$-wave Contacts
• Proposed method to realize the $p$-wave superfluid state using a $s$-wave superfluid Fermi gas with a synthetic spin-orbit interaction
• Thermal transitions, pseudogap behavior and BCS-BEC crossover in Fermi-Fermi mixtures
• Isothermal sweep theorems for ultra-cold quantum gases in a canonical ensemble
• Ground State Properties of an Asymmetric Hubbard Model for Unbalanced Ultracold Fermionic Quantum Gases
• Stability of a Fully Polarized Ultracold Fermi Gas near Zero-Crossing of a p-wave Feshbach Resonance
• Dip-hump temperature dependence of Specific Heat and Effects of Pairing Fluctuations in the Weak-coupling Side of a $p$-wave Interacting Fermi Gas
• Rashbon bound states associated with a spherical spin-orbit coupling in an ultracold Fermi gas with an $s$-wave interaction
• Pairing properties of an odd-frequency superfluid Fermi gas
• Strong-coupling Properties of a $p$-wave Interacting Fermi Gas on the Viewpoint of Specific Heat at Constant Volume
• Spin-orbit coupled repulsive Fermi atoms in a one-dimensional optical lattice
• Specific Heat and Effects of Uniaxial Anisotropy of a $p$-wave Pairing Interaction in a Strongly Interacting Ultracold Fermi Gas
• Superfluidity of identical fermions in an optical lattice: atoms and polar molecules
• Shear Viscosity in the Strong Interaction Regime of a p-wave Superfluid Fermi Gas