Enhanced backscattering of a dilute Bose-Einstein condensate

Abstract

We study experimentally and numerically the quasi-bidimensional transport of a ${}^{87}$Rb Bose-Einstein condensate launched with a velocity $v_0$ inside a disordered optical potential created by a speckle pattern. A time-of-flight analysis reveals a pronounced enhanced density peak in the backscattering direction $-v_0$, a feature reminiscent of coherent backscattering. Detailed numerical simulations indicate however that other effects also contribute to this enhancement, including a "backscattering echo" due to the position-momentum correlations of the initial wave packet.

5 pages, 4 figures

References in corpus (6)

• Direct observation of Anderson localization of matter-waves in a controlled disorder
• Localization of ultrasound in a three-dimensional elastic network
• Shortcut to adiabaticity for an interacting Bose-Einstein condensate
• Coherent Backscattering of Ultracold Atoms
• Anisotropic 2D diffusive expansion of ultra-cold atoms in a disordered potential
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