Boltzmann equations for preheating

Emond, William. T.; Millington, Peter; Saffin, Paul M.

Abstract

We derive quantum Boltzmann equations for preheating by means of the density matrix formalism, which account for both the non-adiabatic particle production and the leading collisional processes between the produced particles. In so doing, we illustrate the pivotal role played by pair correlations in mediating the particle production. In addition, by numerically solving the relevant system of Boltzmann equations, we demonstrate that collisional processes lead to a suppression of the growth of the number density even at the very early stages of preheating.

Citation

Emond, W. T., Millington, P., & Saffin, P. M. (2018). Boltzmann equations for preheating. Journal of Cosmology and Astroparticle Physics, 2018(09), Article 041. https://doi.org/10.1088/1475-7516/2018/09/041

• Journal Article Type: Article
• Acceptance Date: Sep 5, 2018
• Online Publication Date: Sep 27, 2018
• Publication Date: Sep 27, 2018
• Deposit Date: Oct 1, 2018
• Publicly Available Date: Sep 28, 2019
• Journal: Journal of Cosmology and Astroparticle Physics
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 2018
• Issue: 09
• Article Number: 041
• DOI: https://doi.org/10.1088/1475-7516/2018/09/041
• Keywords: Astronomy and Astrophysics
• Public URL: https://nottingham-repository.worktribe.com/output/1141623
• Publisher URL: http://iopscience.iop.org/article/10.1088/1475-7516/2018/09/041/pdf
• Contract Date: Oct 2, 2018