Pair-Breaking in Rotating Fermi Gases

Details Pair-Breaking in Rotating Fermi Gases Pair-Breaking in Rotating Fermi Gases

2008-04-02

arxiv.org/abs/0804.0355v2

Phys. Rev. A 78, 011601(R) (2008)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 2 figures; v2: discussion clarified, typos corrected, one reference added

Scientific paper

10.1103/PhysRevA.78.011601

We study the pair-breaking effect of rotation on a cold Fermi gas in the BCS-BEC crossover region. In the framework of BCS theory, which is supposed to be qualitatively correct at zero temperature, we find that in a trap rotating around a symmetry axis, three regions have to be distinguished: (A) a region near the rotational axis where the superfluid stays at rest and where no pairs are broken, (B) a region where the pairs are progressively broken with increasing distance from the rotational axis, resulting in an increasing rotational current, and (C) a normal-fluid region where all pairs are broken and which rotates like a rigid body. Due to region B, density and current do not exhibit any discontinuities.

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