Competition between relaxation and external driving in the dissipative Landau-Zener problem

P. Nalbach; M. Thorwart

doi:10.1016/j.chemphys.2010.05.007

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arXiv · 1205.1319

Competition between relaxation and external driving in the dissipative Landau-Zener problem

P. Nalbach·M. Thorwart

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Abstract

We study Landau-Zener transitions in a dissipative environment by means of the quasiadiabatic propagator path-integral scheme. It allows to obtain numerically exact results for the full range of the involved parameters. We discover a nonmonotonic dependence of the Landau-Zener transition probability on the sweep velocity which is explained in terms of a simple physical picture. This feature results from a nontrivial competition between relaxation processes and the external sweep and is not captured by perturbative approaches. In addition to the Landau-Zener transition probability, we study the excitation survival probability and also provide a qualitative understanding of the involved competition of time scales.

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P. Nalbach, M. Thorwart. 2012-05-07. Competition between relaxation and external driving in the dissipative Landau-Zener problem. https://doi.org/10.1016/j.chemphys.2010.05.007

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