2007/06/30 by Wei Zhang, L.-M. Duan, L. -M. Duan · 1 citation
Chemistry · Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Spectroscopy and Laser Applications #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physreva.76.042710
published as Phys. Rev. A 76, 042710 (2007) · 9 pages, 7 figures
openalex publication_date 2007/10/16 · arxiv created 2008/05/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
We consider a trapped Fermi gas with population imbalance at finite temperatures and map out the detailed phase diagram across a wide Feshbach resonance. We take the Larkin-Ovchinnikov-Fulde-Ferrel (LOFF) state into consideration and minimize the thermodynamical potential to ensure stability. Under the local density approximation, we conclude that a stable LOFF state is present only on the BCS side of the Feshbach resonance, but not on the BEC side or at unitarity. Furthermore, even on the BCS side, a LOFF state is restricted at low temperatures and in a small region of the trap, which makes a direct observation of a LOFF state a challenging task.