Superfluid-Normal Quantum Phase Transitions in an Imbalanced Fermi Gas

Abstract

We investigate the superfluid-to-normal zero temperature quantum phase transitions of asymmetric two-component Fermi gases as a function of the chemical potential imbalance $h$. The calculations are performed for homogeneous and trapped imbalanced systems. We concentrate at unitarity, characterized by a divergent interaction parameter $k_{F}a$, where most of the current experiments are realized. For homogeneous systems, we determine the critical chemical potential imbalance $h_c$ at which possible phase transitions occur. In the case of trapped gases, we show how $h_c$ can be consistently determined from experimental observations.

arXiv comment7 pages, 2 figures, to appear in JPB

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Cited by in corpus (2)

• The Gor'kov and Melik-Barkhudarov correction to an imbalanced Fermi gas in the presence of impurities
• The normal state of attractive Fermi gases from coupled-cluster theory