Momentum isotropisation in random potentials
1 Laboratoire Charles Fabry UMR 8501, Institut d'Optique, CNRS, Univ. Paris Sud 11, 2 avenue Augustin Fresnel, 91127 Palaiseau Cedex, France
2 Centre for Quantum Technologies, National University of Singapore, 117543 Singapore, Singapore
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Revised: 15 January 2013
Published online: 11 March 2013
When particles are multiply scattered by a random potential, their momentum distribution becomes isotropic on average. We study this quantum dynamics numerically and with a master equation. We show how to measure the elastic scattering time as well as characteristic isotropisation times, which permit to reconstruct the scattering phase function, even in rather strong disorder.
© EDP Sciences, Springer-Verlag, 2013