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Cooper pair coherence in a superfluid Fermi gas of atoms

Gh-S Paraoanu1,3, M Rodriguez2 and P Törmä2

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We study the coherence properties of a trapped two-component gas of fermionic atoms below the BCS critical temperature. We propose an optical method to investigate the Cooper pair coherence across different regions of the superfluid. Near-resonant laser light is used to induce transitions between the two coupled hyperfine states. The beam is split so that it probes two spatially separate regions of the gas. Absorption of the light in this interferometric scheme depends on the Cooper pair coherence between the two regions.


PACS

74.20.Fg BCS theory and its development

74.20.Rp Pairing symmetries (other than s-wave)

74.25.Gz Optical properties

Subjects

Superconductivity

Dates

Issue 23 (14 December 2001)

Received 31 October 2001

Published 21 November 2001



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