Real-time fermions for baryogenesis simulations

Paul M. Saffin, Anders Tranberg

20 Citations (Scopus)

Abstract

We study how to numerically simulate quantum fermions out of thermal equilibrium, in the context of electroweak baryogenesis. We find that by combining the lattice implemen ation of Aarts and Smit [1] with the low cost fermions of Borsanyi and Hindmarsh [2], we are able to describe the dynamics of a classical bosonic system coupled to quantum fermions, that correctly reproduces anomalous baryon number violation. To demonstrate the me hod, we apply it to the 1+1 dimensional axial U(1) model, and perform simulations of a fast symmetry breaking transition. Compared to solving all the quantum mode equations as in [1], we find that this statistical approach may lead to a significant gain in computational time, when applied to 3+1 dimensional physics.

Original languageEnglish
JournalJournal of High Energy Physics (Online)
Volume2011
Issue number7
Pages (from-to)066
ISSN1126-6708
DOIs
Publication statusPublished - 1 Jul 2011

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