Microscopic description of dissipative dynamics of a level crossing transition

Abstract

We analyze the effect of a dissipative bosonic environment on the Landau-Zener-Stuckelberg-Majorana (LZSM) level crossing model by using a microscopic approach to derive the relevant master equation. For an environment at zero temperature and weak dissipation our microscopic approach confirms the independence of the survival probability on the decay rate that has been predicted earlier by the simple phenomenological LZSM model. For strong decay the microscopic approach predicts a notable increase of the survival probability, which signals dynamical decoupling of the initial state. Unlike the phenomenological model our approach makes it possible to study the dependence of the system dynamics on the temperature of the environment. In the limit of very high temperature we find that the dynamics is characterized by a very strong dynamical decoupling of the initial state - temperature-induced quantum Zeno effect.

6 pages, 4 figures

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• Synchronizing Quantum Harmonic Oscillators through Two-Level Systems
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• Resonant transitions due to changing boundaries
• Open multistate Majorana model
• Degenerate Landau-Zener model in the presence of quantum noise
• Log-uniruled affine varieties without cylinder-like open subsets
• Zeno Dynamics and High-Temperature Master Equations Beyond Secular Approximation