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λ φ4 non equilibrium dynamics and kinetic field theory

Witte, FMC; Klevansky, SP; (1995) λ φ4 non equilibrium dynamics and kinetic field theory.

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Off-shellness and inhomogeneities are in the non-equilibrium dynamics of the lambda phi4 model are studied using the closed timepath formalism reformulated as kinetic field theory. We take into account initial correlations up to the 4-point functions. The model is shown to exhibit a SO(1,1) symmetry broken by interactions and initial conditions. The divergence of the corresponding Noethercurrent is calculated and the Ward-Takahashi relations for the broken symmetry are given. They constitute a set of generalized integrated kinetic equations for the general n-point functions. We demonstrate that energy-momentum conservation follows from the transport equations. As an application we discuss inhomogeneities and general non-equilibrium conditions in the free field model. In our solution we identify the casimir-effect.

Type: Working / discussion paper
Title: λ φ4 non equilibrium dynamics and kinetic field theory
UCL classification: UCL > School of Arts and Social Sciences
URI: http://discovery.ucl.ac.uk/id/eprint/1333672
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