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Updated: Jul 28, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Decoherence, tunneling, and noise-induced activation in a double-potential well at high and zero temperature
Nuno D Antunes1, Fernando C Lombardo, Diana Monteoliva
1Centre for Theoretical Physics, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom. n.d.antunes@sussex.ac.uk
Abstract:
We study the effects of the environment on tunneling in an open system described by a static double-well potential. We describe the evolution of a quantum state localized in one of the minima of the potential at t = 0, in both the limits of high and zero environment temperature. We show that the evolution of the system can be summarized in terms of three main physical phenomena--namely, decoherence, quantum tunneling, and noise-induced activation--and we obtain analytical estimates for the corresponding time scales. These analytical predictions are confirmed by large-scale numerical simulations, providing a detailed picture of the main stages of the evolution and of the relevant dynamical processes.
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