Complex time evolution of open quantum systems

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

doi:10.1142/S1230161211000182

Complex time evolution of open quantum systems

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

Research output: Contribution to journal › Article › peer-review

Abstract

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

Original language	English (US)
Pages (from-to)	261-288
Number of pages	28
Journal	Open Systems and Information Dynamics
Volume	18
Issue number	3
DOIs	https://doi.org/10.1142/S1230161211000182
State	Published - Sep 2011
Externally published	Yes

ASJC Scopus subject areas

Statistical and Nonlinear Physics
Statistics and Probability
Mathematical Physics

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10.1142/S1230161211000182

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

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

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DO - 10.1142/S1230161211000182

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Complex time evolution of open quantum systems

Abstract

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