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Particle correlations in a Fermi superfluid

A. Lamacraft
Phys. Rev. A 73, 011602(R) – Published 20 January 2006

Abstract

We discuss the correlations between particles of different momentum in a superfluid Fermi gas, accessible through noise measurements of the absorption images of the expanded gas. We include two elements missing from the simplest treatment, based on the BCS wavefunction: the explicit use of a conserving approximation satisfying particle number conservation and the inclusion of the contribution from Cooper pairs at finite momentum. We expect the latter to be a significant issue in the strongly correlated state emerging in the BCS-Bose-Einstein condensate (BEC) crossover.

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  • Received 7 November 2005

DOI:https://doi.org/10.1103/PhysRevA.73.011602

©2006 American Physical Society

Authors & Affiliations

A. Lamacraft*

  • Rudolf Peierls Centre for Theoretical Physics, 1 Keble Road, Oxford OX1 3NP, United Kingdom and All Souls College, Oxford OX1 4AL, United Kingdom

  • *Electronic address: austen.lamacraft@all-souls.ox.ac.u.k.

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Vol. 73, Iss. 1 — January 2006

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