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arXiv · 2001.06406

Dynamics of the mean-field interacting quantum kicked rotor

Samuel Lellouch·Adam Rançon·Stephan De Bièvre·Dominique Delande·Jean Claude Garreau
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Abstract

We study the dynamics of the many-body atomic kicked rotor with interactions at the mean-field level, governed by the Gross-Pitaevskii equation. We show that dynamical localization is destroyed by the interaction, and replaced by a subdiffusive behavior. In contrast to results previously obtained from a simplified version of the Gross-Pitaevskii equation, the subdiffusive exponent does not appear to be universal. By studying the phase of the mean-field wave function, we propose a new approximation that describes correctly the dynamics at experimentally relevant times close to the start of subdiffusion, while preserving the reduced computational cost of the former approximation.

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Samuel Lellouch, Adam Rançon, Stephan De Bièvre, Dominique Delande, Jean Claude Garreau. 2020-01-17. Dynamics of the mean-field interacting quantum kicked rotor. https://doi.org/10.1103/physreva.101.043624

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