Volume 100, Number 6, December 2012
|Number of page(s)||5|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||14 December 2012|
Enhanced backscattering of a dilute Bose-Einstein condensate
1 Institut Non Linéaire de Nice, UMR 7335, UNS, CNRS - 1361 route des Lucioles, F-06560 Valbonne, France, EU
2 Center for Quantum Technologies, National University of Singapore - 3 Science Drive 2, Singapore 117543, Singapore
3 Wydział Fizyki, Uniwersytet w Białymstoku - ul. Lipowa 41, 15-424 Białystok, Poland, EU
4 Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien - 1020 Vienna, Austria, EU
5 Department of Physics, National University of Singapore - 2 Science Drive 3, Singapore 117543, Singapore
6 Laboratoire Kastler Brossel, Ecole Normale Supérieure, CNRS, UPMC - 4 Place Jussieu, F-75005 Paris, France, EU
Received: 30 November 2012
Accepted: 2 December 2012
We study experimentally and numerically the quasi-bidimensional transport of a 87Rb Bose-Einstein condensate launched with a velocity v0 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 −v0, 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.
PACS: 67.85.Hj – Bose-Einstein condensates in optical potentials / 42.25.Dd – Wave propagation in random media / 05.60.Gg – Quantum transport
© EPLA, 2012
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