Spectroscopy of Superfluid Pairing in Atomic Fermi Gases
arXiv:cond-mat/0404116 · doi:10.1103/PhysRevLett.93.080401
Abstract
We study the dynamic structure factor for density and spin within the crossover from BCS superfluidity of atomic fermions to the Bose-Einstein condensation of molecules. Both structure factors are experimentally accessible via Bragg spectroscopy, and allow for the identification of the pairing mechanism: the spin structure factor allows for the determination of the two particle gap, while the collective sound mode in the density structure reveals the superfluid state.
4 pages, 3 figures