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Coherent Backscattering of Ultra-cold Atoms

Fred Jendrzejewski 1 Kilian Müller 1 Jérémie Richard 1 Aditya Date 1 Thomas Plisson 1 Philippe Bouyer 2 Alain Aspect 1 Vincent Josse 1, * 
* Corresponding author
1 Laboratoire Charles Fabry / Optique atomique
LCF - Laboratoire Charles Fabry
2 lp2n-02,lp2n-11
LP2N - Laboratoire Photonique, Numérique et Nanosciences
Abstract : We report on the direct observation of coherent backscattering (CBS) of ultra-cold atoms, in a quasi two dimensional configuration. Launching atoms with a well defined momentum in a laser speckle disordered potential, we follow the progressive build up of the momentum scattering pattern, consisting of a ring associated with multiple elastic scattering, and the CBS peak in the backward direction. Monitoring the depletion of the initial momentum component and the formation of the angular ring profile allow us to determine microscopic transport quantities. The time resolved evolution of the CBS peak is studied and is found a fair agreement with predictions, at long times as well as at short times. The observation of CBS can be considered a direct signature of coherence in quantum transport of particles in disordered media. It is responsible for the so called weak localization phenomenon, which is the precursor of Anderson localization.
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https://hal-iogs.archives-ouvertes.fr/hal-00719458
Contributor : Vincent Josse Connect in order to contact the contributor
Submitted on : Thursday, July 19, 2012 - 6:53:37 PM
Last modification on : Thursday, February 11, 2021 - 5:24:03 PM
Long-term archiving on: : Friday, December 16, 2016 - 1:32:50 AM

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  • HAL Id : hal-00719458, version 1
  • ARXIV : 1207.4775

Citation

Fred Jendrzejewski, Kilian Müller, Jérémie Richard, Aditya Date, Thomas Plisson, et al.. Coherent Backscattering of Ultra-cold Atoms. 2012. ⟨hal-00719458v1⟩

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