Publikation: Exponential speedup of incoherent tunneling via dissipation
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2021
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Physical Review Research. American Physical Society. 2021, 3(3), 033019. eISSN 2643-1564. Available under: doi: 10.1103/PhysRevResearch.3.033019
Zusammenfassung
We study the escape rate of a particle in a metastable potential in presence of a dissipative bath coupled to the momentum of the particle. Using the semiclassical bounce technique, we find that this rate is exponentially enhanced. In particular, the influence of momentum dissipation depends on the slope of the barrier that the particle is tunneling through. We investigate also the influence of dissipative baths coupled to the position, and to the momentum of the particle, respectively. In this case the rate exhibits a non-monotonic behavior as a function of the dissipative coupling strengths. Remarkably, even in presence of position dissipation, momentum dissipation can enhance exponentially the escape rate in a large range of the parameter space. The influence of the momentum dissipation is also witnessed by the substantial increase of the average energy loss during inelastic (environment-assisted) tunneling.
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530 Physik
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escape rate of a particle, metastable potential, dissipative bath, semiclassical bounce technique, momentum of the particle
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MAILE, Dominik, Sabine ANDERGASSEN, Wolfgang BELZIG, Gianluca RASTELLI, 2021. Exponential speedup of incoherent tunneling via dissipation. In: Physical Review Research. American Physical Society. 2021, 3(3), 033019. eISSN 2643-1564. Available under: doi: 10.1103/PhysRevResearch.3.033019BibTex
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year={2021},
doi={10.1103/PhysRevResearch.3.033019},
title={Exponential speedup of incoherent tunneling via dissipation},
number={3},
volume={3},
journal={Physical Review Research},
author={Maile, Dominik and Andergassen, Sabine and Belzig, Wolfgang and Rastelli, Gianluca},
note={Article Number: 033019}
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