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Updated: Jun 8, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Quasideterministic transport of Brownian particles in an oscillating periodic potential
Pawel Romanczuk1, Felix Müller, Lutz Schimansky-Geier
1Institute of Physics, Humboldt University Berlin, Newtonstr. 15, 12489 Berlin, Germany. romanczuk@physik.hu-berlin.de
Abstract:
We consider overdamped Brownian dynamics in a periodic potential with temporally oscillating amplitude. We analyze the transport which shows effective diffusion enhanced by the oscillations and derive approximate expressions for the diffusion coefficient. Furthermore we analyze the effect of the oscillating potential on the transport if additionally a constant force is applied. We show the existence of synchronization regimes at which the deterministic dynamics is in resonance with the potential oscillations, giving rise to transport with extremely low dispersion. We distinguish slow and fast oscillatory driving and give analytical expressions for the mean velocity and effective diffusion.
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