Resonant activation in a nonadiabatically driven optical lattice

TL;DR

This paper investigates resonant activation in a non-adiabatically driven optical lattice, showing how driving frequency influences atomic current and diffusion direction through interplay of deterministic forces and fluctuations.

Contribution

It demonstrates resonant activation in a dissipative optical lattice with broken time-symmetry, revealing control of atomic diffusion via driving frequency.

Findings

Resonant activation occurs as a function of driving frequency.

The resonance results from interplay between deterministic driving and fluctuations.

Changing driving frequency controls diffusion direction.

Abstract

We demonstrate the phenomenon of resonant activation in a non-adiabatically driven dissipative optical lattice with broken time-symmetry. The resonant activation results in a resonance as function of the driving frequency in the current of atoms through the periodic potential. We demonstrate that the resonance is produced by the interplay between deterministic driving and fluctuations, and we also show that by changing the frequency of the driving it is possible to control the direction of the diffusion.