Time-convolutionless master equations for composite open quantum systems

Abstract

In this work we consider the master equations for composite open quantum systems. We provide purely algebraic formulae for terms of perturbation series defining such equations. We also give conditions under which the Bogolubov-van Hove limit exists and discuss some corrections to this limit. We present an example to illustrate our results. In particular, this example shows, that inhomogeneous terms in time-convolutionless master equations can vanish after reservoir correlation time, but lead to renormalization of initial conditions at such a timescale.

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• On time-dependent projectors and on generalization of thermodynamical approach to open quantum systems
• Superoperator master equations for depolarizing dynamics
• Gaussian approximation and its corrections for driven dissipative Kerr model