Destroying superfluidity by rotating a fermi gas at unitarity

Year: 2008

Authors: Bausmerth I., Recati A., Stringari S.

Autors Affiliation: Dipartimento di Fisica, Università di Trento and CNR-INFM BEC Center, I-38050 Povo, Trento, Italy

Abstract: We study the effect of the rotation on a harmonically trapped Fermi gas at zero temperature under the assumption that vortices are not formed. We show that at unitarity the rotation produces a phase separation between a nonrotating superfluid (S) core and a rigidly rotating normal (N) gas. The interface between the two phases is characterized by a density discontinuity n(N)/n(S)=0.85, independent of the angular velocity. The depletion of the superfluid and the angular momentum of the rotating configuration are calculated as a function of the angular velocity. The conditions of stability are also discussed and the critical angular velocity for the onset of a spontaneous quadrupole deformation of the interface is evaluated.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 100 (7)      Pages from: 070401  to: 070401

KeyWords: Fermi superfluidity; Rotating gas;
DOI: 10.1103/PhysRevLett.100.070401

Citations: 21
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