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Complex Time Evolution of Open Quantum Systems

We combine, in a single set-up,the complex time parametrization in path integration, and the closed time formalism of non-equilibrium field theories to produce a compact representation of the time evolution of the reduced density matrix. In this framework we introduce a cluster-type expansion that facilitates perturbative and non-perturbative calculations in the realm of open quantum systems. The technical details of some very simple examples are discussed.

preprint2011arXivOpen access

C. N. Gagatsos A. I. Karanikas G. I. Kordas

quant-ph

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C. N. Gagatsos A. I. Karanikas G. I. Kordas

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