Polarized Fermi condensates with unequal masses: Tuning the tricritical point

Abstract

We consider a two-component atomic Fermi gas within a mean-field, single-channel model, where both the mass and population of each component are unequal. We show that the tricritical point at zero temperature evolves smoothly from the BEC- to BCS-side of the resonance as a function of mass ratio r. We find that the interior gap state proposed by Liu and Wilczek is always unstable to phase separation, while the breached pair state with one Fermi surface for the excess fermions exhibits differences in its DoSs and pair correlation functions depending on which side of the resonance it lies. Finally, we show that, when r > 3.95, the finite temperature phase diagram of trapped gases at unitarity becomes topologically distinct from the equal mass system.

arXiv comment5 pages, 5 figures

References in corpus (32)

• Observation of resonance condensation of fermionic atom pairs
• Condensation of Pairs of Fermionic Atoms Near a Feshbach Resonance
• Production of cold molecules via magnetically tunable Feshbach resonances
• Vortices and Superfluidity in a Strongly Interacting Fermi Gas
• Pairing and Phase Separation in a Polarized Fermi Gas
• Fermionic Superfluidity with Imbalanced Spin Populations and the Quantum Phase Transition to the Normal State
• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Experimental Study of the BEC-BCS Crossover Region in Lithium 6
• Evidence for Superfluidity in a Resonantly Interacting Fermi Gas
• Inhomogeneous Superconductivity in Condensed Matter and QCD
• Probing many-body states of ultra-cold atoms via noise correlations
• Observation of Phase Separation in a Strongly-Interacting Imbalanced Fermi Gas
• Interior Gap Superfluidity
• Direct Observation of the Superfluid Phase Transition in Ultracold Fermi Gases
• BEC-BCS crossover in "magnetized" Feshbach-resonantly paired superfluids
• Observation of Heteronuclear Feshbach Resonances in a Bose-Fermi Mixture
• Phase separation in asymmetrical fermion superfluids
• Asymmetric Two-component Fermion Systems in Strong Coupling
• Observation of Feshbach resonances between two different atomic species
• Finite temperature phase diagram of a polarised Fermi condensate
• Stability Criteria for Breached Pair Superfluidity
• Direct Imaging of Spatially Modulated Superfluid Phases in Atomic Fermion Systems
• Superfluid stability in BEC-BCS crossover
• Phase diagram of a cold polarized Fermi gas
• Two-species fermion mixtures with population imbalance
• Laser probing of atomic Cooper pairs
• Diatomic molecules in ultracold Fermi gases - Novel composite bosons
• Sarma Phase in Trapped Unbalanced Fermi Gases
• Resonant pairing between Fermions with unequal masses
• Superfluid shells for trapped fermions with mass and population imbalance
• BCS-BEC crossover with a finite-range interaction
• Fermion-mediated BCS-BEC Crossover in Ultracold Potassium-40 Gases

Cited by in corpus (62)

• Theory of ultracold Fermi gases
• Ultra-cold Polarized Fermi Gases
• Phase separation in a polarized Fermi gas at zero temperature
• Highly polarized Fermi gases in two dimensions
• Imbalanced Fermi Gases at Unitarity
• Probing the Interface of a Phase-Separated State in a Repulsive Bose-Fermi Mixture
• Tuning the Tricritical Point with Spin-orbit Coupling in Polarized Fermionic Condensates
• BEC-BCS Crossover of a Trapped Two-Component Fermi Gas with Unequal Masses
• Population and mass imbalance in atomic Fermi gases
• Phase structure of mass- and spin-imbalanced unitary Fermi gases
• Accurate Determination of the Dynamical Polarizability of Dysprosium
• Breakdown of universality for unequal-mass Fermi gases with infinite scattering length
• Quantum phase diagram of fermion mixtures with population imbalance in one-dimensional optical lattices
• Superfluid pairing between fermions with unequal masses
• Lifshitz Point in the Phase Diagram of Resonantly Interacting ${}^{6}Li$-${}^{40}K$ Mixtures
• Evolution of the Pseudogap in a polarized Fermi gas
• Fermi-Fermi Mixtures in the Strong Attraction Limit
• Thermodynamics of the two-component Fermi gas with unequal masses at unitarity
• Zero-temperature equation of state of mass-imbalanced resonant Fermi gases
• Asymmetric Fermi superfluid with different atomic species in a harmonic trap
• Chandrasekhar-Clogston limit and phase separation in Fermi mixtures at Unitarity
• Small mass- and trap-imbalanced two-component Fermi systems
• 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
• Beyond-mean-field description of a trapped unitary Fermi gas with mass and population imbalance
• Finite-Temperature Behavior of an Inter-species Fermionic Superfluid with Population Imbalance
• Fluctuations of imbalanced fermionic superfluids in two dimensions induce continuous quantum phase transitions and non-Fermi liquid behavior
• Lifetime of Feshbach dimers in a Fermi-Fermi mixture of ${}^6$Li and ${}^{40}$K
• Sarma phase in relativistic and non-relativistic systems
• Hetero pairing and component-dependent pseudogap phenomena in an ultracold Fermi gas with mass imbalance
• Quartet Superfluid in Two-dimensional Mass-imbalanced Fermi Mixtures
• A strongly interacting Sarma superfluid near orbital Feshbach resonances
• Phases of spin- and mass-imbalanced ultracold Fermi gases in harmonic traps
• Quantum Lifshitz points and fluctuation-induced first-order phase transitions in imbalanced Fermi mixtures
• Atom-dimer scattering length for fermions with different masses: analytical study of limiting cases
• Phase diagrams of Fermi gases in a trap with mass and population imbalances at finite temperature
• Stability of superfluid phases in the 2D Spin-Polarized Attractive Hubbard Model
• Trap-imbalanced fermion mixtures
• Formation of Cooper pairs between conduction and localized electrons in heavy-fermion superconductors
• Multiple phase separation in one-dimensional mixtures of mass- and population-imbalanced attractive Fermi gases
• Vortex core states in superfluid Fermi-Fermi mixtures with unequal masses
• Temperature Effects in a Fermi Gas with Population Imbalance
• Phase separation in optical lattices in a spin-dependent external potential
• Atom-dimer scattering amplitude for fermionic mixtures with different masses: s-wave and p-wave contributions
• Effective potential and quantum criticality for imbalanced Fermi mixtures
• Unconventional interaction between vortices in a polarized Fermi gas
• Thermal transitions, pseudogap behavior and BCS-BEC crossover in Fermi-Fermi mixtures
• Spin-imbalanced ultracold Fermi gases in a two-dimensional array of tubes
• p-wave phase shift and scattering length of ${}^6$Li
• Collective modes in asymmetric ultracold Fermi systems
• Ground State Properties of an Asymmetric Hubbard Model for Unbalanced Ultracold Fermionic Quantum Gases
• Dynamical properties of a few mass-imbalanced ultra-cold fermions confined in a double-well potential
• Multi-particle instability in a spin-imbalanced Fermi gas
• Phase diagram of asymmetric Fermi gas across Feshbach resonance
• Damping of the Anderson-Bogolyubov mode by spin and mass imbalance in Fermi mixtures
• Enhanced Fulde-Ferrell-Larkin-Ovchinnikov and Sarma superfluid states near an orbital Feshbach resonance
• Pairing in spin polarized two-species fermionic mixtures with mass asymmetry
• Unitary Fermi gas in the epsilon expansion
• Dipole-Mode Spectrum and Hydrodynamic Crossover in a Resonantly Interacting Two-Species Fermion Mixture
• Trap and population imbalanced two-component Fermi gas in the BEC limit
• Thermal-assisted Anisotropy and Thermal-driven Instability in the Superfluidity state of Two-Species Polar Fermi Gas
• Connection between the semiconductor--superconductor transition and the spin-polarized superconducting phase in the honeycomb lattice