Phase Transition in Asymmetrical Superfluids I: Equal Fermi Surfaces

Abstract

In this paper, we study phase transitions in asymmetrical fermion superfluids. In this scenario, the candidates to form pair are particles with mismatched masses and chemical potentials. We derive an expression for the critical temperature in terms of the gap and masses (or chemical potentials) when the constraint of equal Fermi surfaces $m_a{\mu }_a=m_b{\mu }_b$ is imposed.

arXiv commentRevTex, 11 pages, 2 figures, typos corrected and an appendix added, accepted for publication in Phys. Rev. D

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• A novel route to a finite center-of-mass momentum pairing state; current driven FFLO state
• Superfluidity of a spin-imbalanced Fermi gas in a three-dimensional optical lattice
• Temperature Effects in a Fermi Gas with Population Imbalance
• Stability of the Breached Pair State for a Two-species Fermionic System in the Presence of Feshbach Resonance
• Sound Velocity and Meissner Effect in Light-heavy Fermion Pairing Systems
• Collective excitations of an imbalanced fermion gas in a 1D optical lattice