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.
arXiv comment8 pages, 2 figures
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Cited by in corpus (10)
- Nonlinear Waves in Bose-Einstein Condensates: Physical Relevance and Mathematical Techniques
- Cold atoms in the presence of disorder
- Density of states in an optical speckle potential
- Incoherent ensemble dynamics in disordered systems
- Effect of interactions on the diffusive expansion of a Bose-Einstein condensate in a 3D random potential
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- Instanton theory for bosons in disordered speckle potential
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