Next Special CQD (funded by STRUCTURES) will be given by Floriane Arrouas (Université de Toulouse, France)
When: Wednesday, 17th of September
Time: 4:30 pm
Where: PI, INF 226, Goldbox
Title: "Direct observation of Coherent Backward Scattering and Coherent Forward Scattering peaks in a shaken Bose gas"
Abstract:
The quantum kicked rotor is a paradigmatic model of chaotic dynamics, where the classical unbounded diffusion in momentum is suppressed. This effect is called the dynamical localization, and is the equivalent in momentum spaceof Anderson localization, a very well-known phenomenon arising from quantum interference effects in the presence of spatial disorder. Both localization effects exhibit distinct peak signatures in reciprocal space. The Coherent Back-Scattering (CBS) peak is a marker of weak localization, and has been observed in numerous systems. The recently predicted Coherent Forward Scattering (CFS) peak however, is a hallmark of strong (Anderson) localization, and has only been observed indirectly so far. In this talk, I will present the recent experimental observation of the coherent forward scattering peak with ultra-cold atoms. This peak is not only a key hallmark of non-ergodic behavior but also crucially encodes the system’s underlying symmetries.
For information about the Special CQD Seminar, please see: https://cqd.uni-heidelberg.de/talks/talk.php?id=324
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