N-particle sector of quantum field theory as a quantum open system

Details N-particle sector of quantum field theory as a quantum open system N-particle sector of quantum field theory as a quantum open system

1996-11-20

arxiv.org/abs/hep-th/9611155v1

Phys.Rev. D56 (1997) 6702-6705

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, Latex

Scientific paper

10.1103/PhysRevD.56.6702

We give an exposition of a technique, based on the Zwanzig projection
formalism, to construct the evolution equation for the reduced density matrix
corresponding to the n-particle sector of a field theory. We consider the case
of a scalar field with a $g \phi^3$ interaction as an example and construct the
master equation at the lowest non-zero order in perturbation theory.

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