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Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2003

Synchronization of Hamiltonian motion and dissipative effects in optical lattices: Evidence for a stochastic resonance

Gilbert Grynberg
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Résumé

We theoretically study the influence of the noise strength on the excitation of the Brillouin propagation modes in a dissipative optical lattice. We show thatthe excitation has a resonant behavior for a specific amount of noise corresponding to the precise synchronization of the Hamiltonian motion on the opticalpotential surfaces and the dissipative effects associated with optical pumping in the lattice. This corresponds to the phenomenon of stochastic resonance.Our results are obtained by numerical simulations and correspond to the analysis of microscopic quantities (atomic spatial distributions) as well as macroscopicquantities (enhancement of spatial diffusion and pump-probe spectra). We also present a simple analytical model in excellent agreement with the simulations.
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Dates et versions

hal-00000649 , version 1 (29-09-2003)

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Laurent Sanchez-Palencia, Gilbert Grynberg. Synchronization of Hamiltonian motion and dissipative effects in optical lattices: Evidence for a stochastic resonance. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2003, 68, pp.23404. ⟨hal-00000649⟩
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