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Normal mass density of a superfluid Fermi gas at unitarity
Univ Illinois, Dept Phys, Urbana, IL , USA.
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Univ Copenhagen, Niels Bohr Int Acad, Niels Bohr Inst, Copenhagen , Denmark.
2013 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 88, no 4, 043631- p.Article in journal (Refereed) Published
Abstract [en]

We calculate the normal mass density of a paired Fermi gas at unitarity. The dominant contribution near the superfluid transition is from fermionic quasiparticle excitations and is, thus, sensitive to the pairing gap. A comparison with the recent experiment of Sidorenkov et al. [Nature (London) 498, 78 (2013)] suggests that the superfluid gap near the transition temperature is larger than the BCS value, but the data do not permit a quantitative inference of the gap. Calculations of the quenched moment of inertia of a BCS superfluid in a harmonic trap are in reasonable agreement with the earlier experiment of Riedl et al.

Place, publisher, year, edition, pages
American Physical Society , 2013. Vol. 88, no 4, 043631- p.
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:su:diva-97119DOI: 10.1103/PhysRevA.88.043631ISI: 000326078100015OAI: oai:DiVA.org:su-97119DiVA: diva2:675620
Note

AuthorCount:2;

Funding agency:

NSF: PHY09-69790, PHY13-05891

Available from: 2013-12-04 Created: 2013-12-04 Last updated: 2017-12-06Bibliographically approved

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