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Quantum Boltzmann equations for mixing scalar fields

Michael Joyce·Kimmo Kainulainen·Tomislav Prokopec
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Abstract

We report on a work in progress, whose goal is a systematic field theoretical derivation of the quantum transport equations for baryon production in the electroweak plasma at a first order phase transition in the limit of slowly varying background fields (thick wall limit). We start with the Schwinger-Dyson equations for the two point Green function written in the closed time contour (CTC) formalism. The quantum Boltzmann equations for the density matrix arise when the SD-equations are expanded to the first order in the gradients in the on-shell limit. In this paper we consider only scalar fields, but the formalism can easily be extended to fermions.

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Michael Joyce, Kimmo Kainulainen, Tomislav Prokopec. 1999-06-17. Quantum Boltzmann equations for mixing scalar fields. https://arxiv.org/abs/hep-ph/9906413

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