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Normal mass density of a superfluid Fermi gas at unitarity
KTH, Centra, Nordic Institute for Theoretical Physics NORDITA.
2013 (engelsk)Inngår i: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 88, nr 4, s. 043631-Artikkel i tidsskrift (Fagfellevurdert) 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. [New J. Phys. 13, 035003 (2011)].

sted, utgiver, år, opplag, sider
2013. Vol. 88, nr 4, s. 043631-
Emneord [en]
Dominant contributions, Harmonic trap, Mass densities, Moment of inertia, Quasiparticle excitations, Superfluid Fermi gas, Superfluid gap, Superfluid transitions
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Identifikatorer
URN: urn:nbn:se:kth:diva-134739DOI: 10.1103/PhysRevA.88.043631ISI: 000326078100015Scopus ID: 2-s2.0-84886260662OAI: oai:DiVA.org:kth-134739DiVA, id: diva2:668184
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QC 20131129

Tilgjengelig fra: 2013-11-29 Laget: 2013-11-28 Sist oppdatert: 2017-12-06bibliografisk kontrollert

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