Cosmological particle production at strong coupling

Rangamani, Mukund; Rozali, Moshe; Van Raamsdonk, Mark

Abstract

We study the dynamics of a strongly-coupled quantum field theory in a cosmological spacetime using the holographic AdS/CFT correspondence. Specifically we consider a confining gauge theory in an expanding FRWuniverse and track the evolution of the stress-energy tensor during a period of expansion, varying the initial temperature as well as the rate and amplitude of the expansion. At strong coupling, particle production is inseparable from entropy production. Consequently, we find significant qualitative differences from the weak coupling results: at strong coupling the system rapidly loses memory of its initial state as the amplitude is increased. Furthermore, in the regime where the Hubble parameter is much smaller than the initial temperature, the dynamics is well-modelled as a plasma evolving hydrodynamically.

Citation

Rangamani, M., Rozali, M., & Van Raamsdonk, M. (2015). Cosmological particle production at strong coupling. Journal of High Energy Physics, 2015(9), Article 213. https://doi.org/10.1007/jhep09%282015%29213

• Journal Article Type: Article
• Acceptance Date: Sep 9, 2015
• Online Publication Date: Sep 30, 2015
• Publication Date: Sep 30, 2015
• Deposit Date: Apr 25, 2019
• Publicly Available Date: Sep 5, 2019
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2015
• Issue: 9
• Article Number: 213
• DOI: https://doi.org/10.1007/jhep09%282015%29213
• Public URL: https://durham-repository.worktribe.com/output/1297905