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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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:
Depositing User: Saffin, Dr Paul
Date Deposited: 21 Apr 2017 12:37
Last Modified: 04 May 2020 16:30

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