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Journal of Low Temperature Physics

, Volume 140, Issue 5–6, pp 409–428 | Cite as

Quantum Phase Transition in the BCS-to-BEC Evolution of p-wave Fermi Gases

  • S. S. Botelho
  • C. A. R. Sá de Melo
Article

Abstract

We discuss the possibility of a quantum phase transition in ultra-cold spin-polarized Fermi gases which exhibit a p-wave Feshbach resonance. We show that when fermionic atoms form a condensate that can be externally tuned between the BCS and BEC limits, the zero temperature compressibility and the spin susceptibility of the fermionic gas are non-analytic functions of the two-body bound state energy. This non-analyticity is due to a massive rearrangement of the momentum distribution in the ground state of the system. Furthermore, we show that the low temperature superfluid density is also non-analytic and exhibits a dramatic change in behavior when the critical value of the bound state energy is crossed.

Keywords

BCS-to-BEC transition Cold Fermi gases Quantum fluids 

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  1. 1.School of PhysicsGeorgia Institute of TechnologyAtlantaU.S.A

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