Density Correlations in Cold Atomic Gases: Atomic Speckles in the Presence of Disorder
arXiv:0801.4858 · doi:10.1103/PhysRevA.77.033624
Abstract
The phenomenon of random intensity patterns, for waves propagating in the presence of disorder, is well known in optics and in mesoscopic physics. We study this phenomenon for cold atomic gases expanding, by a diffusion process, in a weak random potential. We show that the density-density correlation function of the expanding gas is strongly affected by disorder and we estimate the typical size of a speckle spot, i.e., a region of enhanced or depleted density. Both a Fermi gas and a Bose-Einstein condensate (in a mean field approach) are considered.
8 pages, 2 figures
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Cited by in corpus (4)
- Effect of interactions on the diffusive expansion of a Bose-Einstein condensate in a 3D random potential
- Long-range correlations of density in a Bose-Einstein condensate expanding in a random potential
- Phases and dynamics of few fermionic impurities immersed in two-dimensional boson droplets
- Evolution of density variations in a trapped atomic superfluid driven into turbulence