2006/07/31 by Gautam Rupak, Thomas Schäfer, Thomas Schaefer +1
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #cond-mat.other #nucl-th
paper · pdf · doi:10.1103/physreva.75.023606
published as Phys.Rev.A75:023606,2007 · 5 pages, 5 figures, LaTeX2e; minor changes, note added at the end, to be published in PRA
arxiv created 2006/12/06 · openalex publication_date 2007/02/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider a polarized Fermi gas in the unitarity limit. Results are calculated analytically up to next-to-leading order in an expansion about d=4 spatial dimensions. We find a first order transition from superfluid to normal phase. The critical chemical potential asymmetry for this phase transition is \ensuremathδ\ensuremathμc=\frac2\ensuremathμ\ensuremathε(1\ensuremath-0.467\ensuremathε), where \ensuremathε=4\ensuremath-d is the expansion parameter and \ensuremathμ is the average chemical potential of the two fermion species. Stability of the superfluid phase in the presence of supercurrents is also studied.