engleski

Out of Equilibrium TFT beyond Gradient Expansion: Resummed Propagators

We study out of equilibrium thermal field theories at early times. We find that in the diagrams containing vertices with only outgoing advanced propagators or incoming retarded propagators the energy is not conserved. This leads to the conclusion that for such diagrams the finite and the infinite time path do not give physically equivalent results.

out of equilibrium; thermal field theory; finite time path; infinite time path

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