Quantum Phase Transition in the BCS-to-BEC Evolution of p-wave Fermi Gases
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
Cite
@article{arxiv.cond-mat/0504263,
title = {Quantum Phase Transition in the BCS-to-BEC Evolution of p-wave Fermi Gases},
author = {S. S. Botelho and C. A. R. Sa de Melo},
journal= {arXiv preprint arXiv:cond-mat/0504263},
year = {2009}
}
Comments
15 pages; submitted to the Journal of Low Temperature Physics