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Trap-Imbalanced Fermion Mixtures

Published

Author(s)

Menderes Iskin, Carl J. Williams

Abstract

We analyze the ground state phases of two-component population- andmass-balanced but trap-imbalanced fermion mixtures as a function of interactionstrength from the weak attraction Bardeen-Cooper-Schrieffer (BCS) to the strongattraction Bose-Einstein condensation (BEC) limit. In the BCS limit, we findthat the unpolarized superfluid (UPS) fermions exist away from the central coreof the trapping potentials, and are surrounded by partially polarized normal(PPN) fermions. As the interactions increase towards unitarity, we find that thecentral PPN core first transitions to a UPS, and then expands towards the edgesuntil the entire mixture becomes a UPS in the BEC limit.
Citation
Physical Review A (Atomic, Molecular and Optical Physics)
Volume
77

Keywords

Bardeen-Cooper-Schrieffer Superfluidity, BCS-BEC crossover, Bose-Einstein condensation, Fulde-Ferrell-Larkin-Ovchinnikov phase

Citation

Iskin, M. and Williams, C. (2008), Trap-Imbalanced Fermion Mixtures, Physical Review A (Atomic, Molecular and Optical Physics), [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=840899 (Accessed October 23, 2021)
Created January 7, 2008, Updated February 17, 2017