Variational approximation for two-time correlation functions in ${\Phi }^4$ theory : optimization of the dynamics

Abstract

We apply the time-dependent variational principle of Balian and Vénéroni 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.

15 pages Latex

References in corpus (2)

• Nonequilibrium Quantum Dynamics Of Disoriented Chiral Condensates
• Can Disordered Chiral Condensates Form? A Dynamical Perspective

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