Complex time evolution of open quantum systems

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

Research output: Contribution to journalArticlepeer-review


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 languageEnglish (US)
Pages (from-to)261-288
Number of pages28
JournalOpen Systems and Information Dynamics
Issue number3
StatePublished - Sep 2011
Externally publishedYes

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Mathematical Physics


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