Real-time fermions for baryogenesis simulations

Saffin, Paul M. and Tranberg, Anders (2011) Real-time fermions for baryogenesis simulations. Journal of High Energy Physics, 2011 (7). 066. ISSN 1029-8479

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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 implementation 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 method, 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.

Item Type: Article
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: 10.1007/JHEP07(2011)066
Depositing User: Saffin, Dr Paul
Date Deposited: 21 Apr 2017 12:37
Last Modified: 21 Apr 2017 12:46
URI: http://eprints.nottingham.ac.uk/id/eprint/42136

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