Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 26: Quantum effects: Miscellaneous
Q 26.5: Vortrag
Dienstag, 18. März 2014, 15:00–15:15, DO26 208
Theory for all-Optics Realisation of the Quantum Kicked Rotor — •Fabian Brock1 and Sandro Wimberger1,2 — 1Institute for Theoretical Physics, Heidelberg, Germany — 2Dipartimento di Fisica e Science della Terra, Università di Parma, Via G.P. Usberti 7/a, I-43124 Parma
The kicked rotor is one of the standard examples for chaos in classical mechanics. Also its quantum version has remarkable properties such as dynamical localisation.
In this talk we investigate the behaviour of a quantum kicked particle in position space extended to a line. In particular, we examine the probability to stay in the central well of the kick potential, where the system is initially prepared. This is inspired by recent experiments at the Friedrich-Alexander-Universität in Erlangen [1]. For small kicking parameters we introduce a model based on tunneling to describe the survival probability. For stronger kicks, the system’s behaviour can be explained with spectral arguments.
[1] C. Bersch, G. Onishchukov, and U. Peschel, Phys. Rev. Lett. 109 093903 (2012).