Chandrasekhar-Clogston limit and phase separation in Fermi mixtures at Unitarity

Abstract

Using many-body results available from diagrammatic and {\it ab initio} Monte Carlo calculations we analyze the phase diagram $\mu =({\mu }_{\uparrow }+{\mu }_{\downarrow })/2$ versus $h=({\mu }_{\uparrow }-{\mu }_{\downarrow })/2$ of a unitary Fermi gas at zero temperature with population imbalance and unequal masses. We identify different regions where the gas is superfluid, partially polarized or fully polarized and determine the corresponding coexistence conditions. The asymmetry in the phase diagram, caused by the mass imbalance, and its effect on the Chandrasekhar-Clogston limit for the critical polarization are explicitly discussed. The equation of state of the superfluid and normal phases is employed, within the local density approximation, to predict novel phase separated configurations in the presence of harmonic trapping potentials.

arXiv comment7 pages, 6 figures; comments added according to referee report; version as published

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Cited by in corpus (20)

• Ultra-cold Polarized Fermi Gases
• Trimers, molecules and polarons in imbalanced atomic Fermi gases
• Broad Feshbach resonance in the 6Li-40K mixture
• Collisional Stability of 40K Immersed in a Strongly Interacting Fermi Gas of 6Li
• Heavy-Light Fermion Mixtures at Unitarity
• Production of a degenerate Fermi-Fermi mixture of dysprosium and potassium atoms
• All-optical production of a degenerate mixture of 6Li and 40K and creation of heteronuclear molecules
• Feshbach resonances in the 6Li-40K Fermi-Fermi mixture: Elastic versus inelastic interactions
• Observation of a Strong Atom-Dimer Attraction in a Mass-Imbalanced Fermi-Fermi Mixture
• Breakdown of universality for unequal-mass Fermi gases with infinite scattering length
• Single Impurity In Ultracold Fermi Superfluids
• Finite-temperature equation of state of polarized fermions at unitarity
• Thermodynamics of the two-component Fermi gas with unequal masses at unitarity
• Lifetime of Feshbach dimers in a Fermi-Fermi mixture of ${}^6$Li and ${}^{40}$K
• Atom-dimer scattering length for fermions with different masses: analytical study of limiting cases
• Zero-temperature phase diagram of Yukawa bosons
• Atom-dimer scattering amplitude for fermionic mixtures with different masses: s-wave and p-wave contributions
• Mass-imbalanced Fermi gases with spin-orbit coupling
• Superfluid-Normal Quantum Phase Transitions in an Imbalanced Fermi Gas
• BCS-BEC crossover of the strongly interacting ${}^6$Li-${}^{40}$K mixture