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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. GagatsosA. I. KaranikasG. I. Kordas
quant-ph
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C. N. GagatsosA. I. KaranikasG. I. Kordas

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