We study nonlinear response in weakly coupled nonequilibrium φ4 theory in the context of both classical transport theory and real time quantum field theory, based on a generalized Kubo formula which we derive. A novel connection between these two approaches is established which provides a diagrammatic interpretation of the Boltzmann equation.

Topics
Electronic transport, Quantum field theory, Perturbation theory, Nonequilibrium statistical mechanics
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© 2001 American Institute of Physics.
2001
American Institute of Physics
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