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Pair breaking in rotating Fermi gases

Abstract : 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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Submitted on : Tuesday, May 27, 2008 - 10:57:22 AM
Last modification on : Thursday, April 8, 2021 - 3:39:33 AM

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Michael Urban, Peter Schuck. Pair breaking in rotating Fermi gases. Physical Review A, American Physical Society, 2008, 78 (1), pp.011601(R). ⟨10.1103/PhysRevA.78.011601⟩. ⟨in2p3-00282307⟩

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