Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2008-01-31
Phys. Rev. A 77, 033624 (2008)
Physics
Condensed Matter
Disordered Systems and Neural Networks
8 pages, 2 figures
Scientific paper
10.1103/PhysRevA.77.033624
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.
Henseler Peter
Shapiro Boris
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