Particle correlations in a fermi superfluid
arXiv:cond-mat/0510111 · doi:10.1103/PhysRevA.73.011602
Abstract
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.
Published version
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- Density correlations in ultracold Fermi systems within the exact Richardson solution
- A Study of Elementary Excitations of Liquid Helium-4 Using Macro-orbital Microscopic Theory
- Sudden-quench dynamics of Bardeen-Cooper-Schrieffer states in deep optical lattices