Coherent multiple forward scattering peak unveiled by Anderson localization

Details Coherent multiple forward scattering peak unveiled by Anderson localization Coherent multiple forward scattering peak unveiled by Anderson localization

2012-04-16

arxiv.org/abs/1204.3451v1

Physics

Condensed Matter

Quantum Gases

Scientific paper

We investigate the dynamics of a coherent matter wave packet launched in a random potential. As predicted by Cherroret et al. [Phys. Rev. A 85 011604(R) (2012)], the coherent backscattering signal in the momentum distribution freezes at the onset of Anderson localization. At the same time, a novel interference peak rises in the forward direction. An explanation in terms of chained maximally crossed diagrams predicts that the forward scattering peak emerges on a time scale $\tau_\text{loc}^* = 2m\xi^2/\hbar$ set by the localization length $\xi$.

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