Schomerus, Henning and Lutz, Eric (2007) Nonexponential decoherence and momentum subdiffusion in a quantum Levy kicked rotator. Physical Review Letters, 98 (26). p. 260401. ISSN 1079-7114Full text not available from this repository.
We investigate decoherence in the quantum kicked rotator (modeling cold atoms in a pulsed optical field) subjected to noise with power-law tail waiting-time distributions of variable exponent (LÃ©vy noise). We demonstrate the existence of a regime of nonexponential decoherence where the notion of a decoherence rate is ill defined. In this regime, dynamical localization is never fully destroyed, indicating that the dynamics of the quantum system never reaches the classical limit. We show that this leads to quantum subdiffusion of the momentum, which should be observable in an experiment.
|Journal or Publication Title:||Physical Review Letters|
|Subjects:||Q Science > QC Physics|
|Departments:||Faculty of Science and Technology > Physics|
|Deposited By:||Dr Henning Schomerus|
|Deposited On:||16 Oct 2007|
|Last Modified:||24 Feb 2017 05:04|
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