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

Abstract

We theoretically study the influence of the noise strength on the excitation of the Brillouin propagation modes in a dissipative optical lattice. We show that the excitation has a resonant behavior for a specific amount of noise corresponding to the precise synchronization of the Hamiltonian motion on the optical potential 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 macroscopic quantities (enhancement of spatial diffusion and pump-probe spectra). We also present a simple analytical model in excellent agreement with the simulations.

References in corpus (5)

• Phase-control of directed diffusion in a symmetric optical lattice
• Brillouin propagation modes in optical lattices: interpretation in terms of nonconventional stochastic resonance
• Stochastic resonance in periodic potentials: realization in a dissipative optical lattice
• Rayleigh Scattering and Atomic Dynamics in Dissipative Optical Lattices
• Anisotropic velocity distributions in 3D dissipative optical lattices

Cited by in corpus (4)

• Transport regimes of cold gases in a two-dimensional anisotropic disorder
• Directed transport of Brownian particles in a double symmetric potential
• Observation of stochastic resonance in directed propagation of cold atoms
• Controllable 3D atomic Brownian motor in optical lattices