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Updated: Feb 14, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Enhanced diffusion with abnormal temperature dependence in underdamped space-periodic systems subject to
I G Marchenko1, I I Marchenko2, A V Zhiglo3
1NSC "Kharkov Institute of Physics and Technology", 1 Akademicheskaya street, Kharkov 61108, Ukraine and Kharkov National University, 4 Svobody Square, Kharkov 61077, Ukraine.
Abstract:
We present a study of the diffusion enhancement of underdamped Brownian particles in a one-dimensional symmetric space-periodic potential due to external symmetric time-periodic driving with zero mean. We show that the diffusivity can be enhanced by many orders of magnitude at an appropriate choice of the driving amplitude and frequency. The diffusivity demonstrates abnormal (decreasing) temperature dependence at the driving amplitudes exceeding a certain value. At any fixed driving frequency Ω normal temperature dependence of the diffusivity is restored at low enough temperatures, T
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