Population and mass imbalance in atomic Fermi gases

Abstract

We develop an accurate theory of resonantly interacting Fermi mixtures with both spin and mass imbalance. We consider Fermi mixtures with arbitrary mass imbalances, but focus in particular on the experimentally available ${}^6$Li-${}^{40}$K mixture. We determine the phase diagram of the mixture for different interactions strengths that lie on the BCS side of the Feshbach resonance. We also determine the universal phase diagram at unitarity. We find for the mixtures with a sufficiently large mass imbalance, that includes the ${}^6$Li-${}^{40}$K mixture, a Lifshitz point in the universal phase diagram that signals an instability towards a supersolid phase.

17 pages, 17 figures

References in corpus (13)

• Collective excitations of a degenerate gas at the BEC-BCS crossover
• Molecular Probe of Pairing in the BEC-BCS Crossover
• Phase diagram of a two-component Fermi gas with resonant interactions
• Exploring an ultracold Fermi-Fermi mixture: Interspecies Feshbach resonances and scattering properties of 6Li and 40K
• Normal state of a polarized Fermi gas at unitarity
• Critical Temperature and Thermodynamics of Attractive Fermions at Unitarity
• Ultracold Heteronuclear Fermi-Fermi Molecules
• A Unitary Fermi Supersolid: The Larkin-Ovchinnikov Phase
• Polarized Fermi condensates with unequal masses: Tuning the tricritical point
• Larkin-Ovchinnikov state in resonant Fermi gas
• Renormalization Group Theory for the Imbalanced Fermi Gas
• Fermi-Fermi Mixtures in the Strong Attraction Limit
• Co-existence and shell structures of several superfluids in trapped three-component Fermi mixtures

Cited by in corpus (51)

• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Imbalanced Fermi Gases at Unitarity
• Probing the Interface of a Phase-Separated State in a Repulsive Bose-Fermi Mixture
• Production of a degenerate Fermi-Fermi mixture of dysprosium and potassium atoms
• Feshbach resonances in the 6Li-40K Fermi-Fermi mixture: Elastic versus inelastic interactions
• Phase structure of mass- and spin-imbalanced unitary Fermi gases
• Quantum mixtures of ultracold gases of neutral atoms
• Accurate Determination of the Dynamical Polarizability of Dysprosium
• Resonantly Interacting Fermi-Fermi Mixture of ${}^{161}$Dy and ${}^{40}$K
• Phase structure of spin-imbalanced unitary Fermi gases
• Enhancement effect of mass imbalance on Fulde-Ferrell-Larkin-Ovchinnikov type of pairing in Fermi-Fermi mixtures of ultracold quantum gases
• Itinerant ferromagnetism in an interacting Fermi gas with mass imbalance
• Instability of Fulde-Ferrell-Larkin-Ovchinnikov states in three and two dimensions
• Polarons in Extremely Polarized Fermi Gases: The Strongly Interacting 6Li-40K Mixture
• The ab initio study of unconventional superconductivity in CeCoIn${}_5$ and FeSe
• Realization of a Cold Mixture of Fermionic Chromium and Lithium Atoms
• Excitation properties and effects of mass imbalance in the BCS-BEC crossover regime of an ultracold Fermi gas
• Renormalization theory for the Fulde-Ferrell-Larkin-Ovchinnikov states at $T>0$
• Beyond-mean-field description of a trapped unitary Fermi gas with mass and population imbalance
• Low temperature properties of the fermionic mixtures with mass imbalance in optical lattice
• Lifetime of Feshbach dimers in a Fermi-Fermi mixture of ${}^6$Li and ${}^{40}$K
• Ultracold LiCr: a new pathway to quantum gases of paramagnetic polar molecules
• Hetero pairing and component-dependent pseudogap phenomena in an ultracold Fermi gas with mass imbalance
• A strongly interacting Sarma superfluid near orbital Feshbach resonances
• Double-degenerate Fermi mixtures of ${}^6$Li and ${}^{53}$Cr atoms
• Fermi gases with imaginary mass imbalance and the sign problem in Monte Carlo calculations
• Quantum Lifshitz points and fluctuation-induced first-order phase transitions in imbalanced Fermi mixtures
• Phases of spin- and mass-imbalanced ultracold Fermi gases in harmonic traps
• Phase diagrams of Fermi gases in a trap with mass and population imbalances at finite temperature
• Larkin-Ovchinnikov phases in two-dimensional square lattices
• Multiple phase separation in one-dimensional mixtures of mass- and population-imbalanced attractive Fermi gases
• Quantum Coherent States of Interacting Bose-Fermi Mixtures in One Dimension
• Effective potential and quantum criticality for imbalanced Fermi mixtures
• Induced interactions in the BCS-BEC crossover of two-dimensional Fermi gases with Rashba spin-orbit coupling
• Stability of the Fulde-Ferrell-Larkin-Ovchinnikov states in anisotropic systems and critical behavior at thermal $m$-axial Lifshitz points
• Thermal transitions, pseudogap behavior and BCS-BEC crossover in Fermi-Fermi mixtures
• Quantum Monte Carlo study of strongly interacting Fermi gases
• Pauli limited d-wave superconductors: Quantum breached pair phase and thermal transitions
• Phase Separation of Superfluids in the Chain of Four-Component Ultracold Atoms
• Mass-imbalanced Fermi gases with spin-orbit coupling
• Mass-Imbalanced Superconductivity in Effective Two-Channel Kondo Lattice
• Low-energy modes of spin-imbalanced Fermi gases in BCS phase
• Superfluid phase transition and strong-coupling effects in an ultracold Fermi gas with mass imbalance
• Dependence of interface conductivity on relevant physical parameters in polarized Fermi mixtures
• Damping of the Anderson-Bogolyubov mode by spin and mass imbalance in Fermi mixtures
• The Gor'kov and Melik-Barkhudarov correction to an imbalanced Fermi gas in the presence of impurities
• Effective binding potential from Casimir interactions: the case of the Bose gas
• BCS-BEC crossover of the strongly interacting ${}^6$Li-${}^{40}$K mixture
• Broad Feshbach resonance with a large background scattering length in a fermionic atom-molecule mixture
• Interplay of mass imbalance and frustration in correlated band insulators
• Temporal fluctuation induced order in conventional superconductors