2008/11/11 by Masaki Tezuka, Youichi Yanase, Tezuka, Masaki +3
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Other Condensed Matter (cond-mat.other) #Physics of Superconductivity and Magnetism #Quantum Gases (cond-mat.quant-gas) #cond-mat.other #cond-mat.quant-gas
paper · pdf · doi:10.48550/arxiv.0811.1650
v3: minor revision and clarification of v2. 4 pages, 4 figures
openalex publication_date 2008/11/11 · arxiv created 2010/06/01 · arxiv updated 2010/06/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We show that the maximum population imbalance ratio PCC for a two-component Fermi gas near the unitarity limit to condense does not increase with the trap aspect ratio λ, by two methods of 1) solving the Bogoliubov-de Gennes equations with coupling-constant renormalization, and 2) studying the pairing susceptibility by the real-space self-consistent T-matrix approximation. The deviation of the cloud shape from what is expected from the trap shape increases but stays minor with increasing λ up to 50. This finding indicates that despite the apparent discrepancy between the MIT and Rice experiments over the value of PCC and the validity of local density approximation, the equilibrium state of the system for the aspect ratio in the Rice experiment should be consistent with that of MIT.