Quantum Markovian Dynamics after the Bath Correlation Time

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Abstract

For a model of a multilevel system interacting with several baths at zero temperature, it is shown that its dynamics becomes Markovian after the bath correlation time. We take into account not only the contribution of the bath spectral density, which leads to a continuous correlation function, but also the ohmic contribution to the spectral density, which leads to a renormalization of both equations and initial conditions. An explicit Gorini–Kossakowski–Sudarshan–Lindblad equation describing the dynamics of the system after the bath correlation time is derived, and the form of initial conditions for this equation is obtained. They do not coincide with the exact initial conditions due to the renormalization associated with the ohmic contribution and due to the short initial non-Markovian time interval preceding the bath correlation time.

About the authors

A. E. Teretenkov

Steklov Mathematical Institute, Russian Academy of Sciences

Author for correspondence.
Email: taemsu@mail.ru
119991, Moscow, Russia

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