JENDRZEJEWSKI, Fred; MÜLLER, Kilian; RICHARD, Jérémie; DATE, Aditya; PLISSON, Thomas; BOUYER, Philippe; ASPECT, Alain; JOSSE, Vincent

doi:10.1103/PhysRevLett.109.195302

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

JENDRZEJEWSKI, Fred
Laboratoire Charles Fabry / Optique atomique

MÜLLER, Kilian
Laboratoire Charles Fabry / Optique atomique

RICHARD, Jérémie
Laboratoire Charles Fabry / Optique atomique

Langue

Article de revue

Ce document a été publié dans

Physical Review Letters. 2012-11-05, vol. 109, p. 195302

American Physical Society

Résumé en anglais

We report on the direct observation of coherent backscattering (CBS) of ultracold 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 allows 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.< Réduire

Mots clés en anglais

Matter waves

Ultracold gases

trapped gases

Quantum transport

Wave propagation in random media

Localization effects (Anderson or weak localization)

URI

https://oskar-bordeaux.fr/handle/20.500.12278/181235

DOI

http://dx.doi.org/10.1103/PhysRevLett.109.195302

Projet Européen

ERC-Quantatop

Origine

Importé de hal

Unités de recherche

Laboratoire Photonique, Numérique et Nanosciences (LP2N) - UMR 5298