Cosmological Classicalization: Maintaining Unitarity under Relevant Deformations of the Einstein-Hilbert Action
High Energy Physics - Theory
2011-05-23 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
Generic relevant deformations of Einstein's gravity theory contain additional degrees of freedom that have a multi-facetted stabilization dynamics on curved spacetimes. We show that these relevant degrees of freedom are self-protected against unitarity violations by the formation of classical field lumps that eventually merge to a new background geometry. The transition is heralded by the massive decay of the original vacuum and evolves through a strong coupling regime. This process fits in the recently proposed classicalization mechanism and extends it further to free field dynamics on curved backgrounds.
Keywords
Cite
@article{arxiv.1102.0313,
title = {Cosmological Classicalization: Maintaining Unitarity under Relevant Deformations of the Einstein-Hilbert Action},
author = {Felix Berkhahn and Dennis D. Dietrich and Stefan Hofmann},
journal= {arXiv preprint arXiv:1102.0313},
year = {2011}
}
Comments
4 pages, 1 figure; v2 as published in PRL: title modified, references updated, typos removed, content otherwise unchanged