Optical Perturbation of Atoms in weak localization

We determine the microscopic transport parameters that are necessary to describe the diffusion process of the atomic gas in optical speckle. Applying the self-consistent theory to calculate the self-energy of the atomic gas in... [ view full abstract ]

We determine the microscopic transport parameters that are necessary to describe the diffusion process of the atomic gas in optical speckle. Applying the self-consistent theory to calculate the self-energy of the atomic gas in random potential. We will compute the spectral function numerically by an average over disorder realizations in terms of the Greens function. The spectral function behaves as a free space expression A(ε,k) ∝δ(ε− ε_k) strongly peaked near k = √ε. The aim of the present work is to using this theory to discuss the behavior of the energy distribution of the atoms to estimate a correction to the on-shell mobility edge.  We have included the real part of the self-energy by incorporating disorder-induced shift of the energy states in the theory. Our results show that the mobility position changes according to the disorder mean value  and predict a negative mobility edge.