Momentum distribution of a Fermi gas of atoms in the BCS-BEC crossover
  We observe dramatic changes in the atomic momentum distribution of a Fermi gas in the region of the BCS-BEC crossover. We study the shape of the momentum distribution and the kinetic energy as a function of interaction strength. The momentum distributions are compared to a mean-field crossover theory, and the kinetic energy is compared to theories for the two weakly interacting limits. The temperature dependence of the distribution is also presented. 
C. A. Regal, M. Greiner, S. Giorgini, M. Holland, and D. S. Jin