Journal
PHYSICAL REVIEW A
Volume 79, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.043622
Keywords
ab initio calculations; density functional theory; equations of state; fermion systems; Monte Carlo methods; phase diagrams; phase separation; phase transformations; superfluidity
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Funding
- Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR)
- EuroQUAM FerMix program
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Using many-body results available from diagrammatic and ab initio Monte Carlo calculations we analyze the phase diagram mu=(mu(up arrow)+mu(down arrow))/2 versus h=(mu(up arrow)-mu(down arrow))/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 phase separated configurations in the presence of harmonic trapping potentials.
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