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Title: Trapped fermions across a Feshbach resonance with population imbalance

Abstract

We investigate the phase separation of resonantly interacting fermions in a trap with imbalanced spin populations, both at zero and at finite temperatures. We directly minimize the thermodynamical potential under the local density approximation instead of using the gap equation, as the latter may give unstable solutions. On the BEC side of the resonance, one may cross three different phases from the trap center to the edge; while on the BCS side or at resonance, typically only two phases show up. We compare our results with the recent experiment, and the agreement is remarkable.

Authors:
;  [1]
  1. FOCUS Center and MCTP, Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States)
Publication Date:
OSTI Identifier:
20786834
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 73; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevA.73.031604; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; APPROXIMATIONS; COMPARATIVE EVALUATIONS; DENSITY; FERMIONS; MATHEMATICAL SOLUTIONS; POTENTIALS; RESONANCE; SPIN; TRAPPING; TRAPS

Citation Formats

Yi, W., and Duan, L.-M. Trapped fermions across a Feshbach resonance with population imbalance. United States: N. p., 2006. Web. doi:10.1103/PHYSREVA.73.0.
Yi, W., & Duan, L.-M. Trapped fermions across a Feshbach resonance with population imbalance. United States. doi:10.1103/PHYSREVA.73.0.
Yi, W., and Duan, L.-M. Wed . "Trapped fermions across a Feshbach resonance with population imbalance". United States. doi:10.1103/PHYSREVA.73.0.
@article{osti_20786834,
title = {Trapped fermions across a Feshbach resonance with population imbalance},
author = {Yi, W. and Duan, L.-M.},
abstractNote = {We investigate the phase separation of resonantly interacting fermions in a trap with imbalanced spin populations, both at zero and at finite temperatures. We directly minimize the thermodynamical potential under the local density approximation instead of using the gap equation, as the latter may give unstable solutions. On the BEC side of the resonance, one may cross three different phases from the trap center to the edge; while on the BCS side or at resonance, typically only two phases show up. We compare our results with the recent experiment, and the agreement is remarkable.},
doi = {10.1103/PHYSREVA.73.0},
journal = {Physical Review. A},
number = 3,
volume = 73,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}