Quantum diffusion in the quasiperiodic kicked rotor

Details Quantum diffusion in the quasiperiodic kicked rotor Quantum diffusion in the quasiperiodic kicked rotor

2004-12-02

arxiv.org/abs/quant-ph/0412019v1

Europhysics Letters 69, 327-333 (2005)

Physics

Quantum Physics

7 pages, 4 figures, accepted for publication in Europhysics Letters

Scientific paper

10.1209/epl/i2004-10353-8

We study the mechanisms responsible for quantum diffusion in the quasiperiodic kicked rotor. We report experimental measurements of the diffusion constant on the atomic version of the system and develop a theoretical approach (based on the Floquet theorem) explaining the observations, especially the ``sub-Fourier'' character of the resonances observed in the vicinity of exact periodicity, i.e. the ability of the system to distinguish two neighboring driving frequencies in a time shorter than the inverse of the difference of the two frequencies.

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