Variational approximation for two-time correlation functions in $Φ^4$ theory : optimization of the dynamics

Details Variational approximation for two-time correlation functions in $Φ^4$ theory : optimization of the dynamics Variational approximation for two-time correlation functions in $Φ^4$ theory : optimization of the dynamics

1995-05-05

arxiv.org/abs/hep-th/9505031v1

Phys.Rev. D52 (1995) 7121-7128

Physics

High Energy Physics

High Energy Physics - Theory

15 pages Latex

Scientific paper

10.1103/PhysRevD.52.7121

We apply the time-dependent variational principle of Balian and V\'en\'eroni
to the $ \Phi^4$ theory. An appropriate parametrization for the variational
objects allows us to write coupled dynamical equations from which we derive
approximations for the two-time correlation functions involving two, three or
four field operators.

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