Particle correlations in a fermi superfluid

Details Particle correlations in a fermi superfluid Particle correlations in a fermi superfluid

2005-10-05

arxiv.org/abs/cond-mat/0510111v2

Phys. Rev. A 73, 011602(R) (2006)

Physics

Condensed Matter

Statistical Mechanics

Published version

Scientific paper

10.1103/PhysRevA.73.011602

We discuss correlations between particles of different momentum in a superfluid fermi gas, accessible through noise measurements of 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-BEC crossover.

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