Cosmological Classicalization: Maintaining Unitarity under Relevant Deformations of the Einstein-Hilbert Action

Details Cosmological Classicalization: Maintaining Unitarity under Relevant Deformations of the Einstein-Hilbert Action Cosmological Classicalization: Maintaining Unitarity under Relevant Deformations of the Einstein-Hilbert Action

2011-02-01

arxiv.org/abs/1102.0313v2

Phys.Rev.Lett.106:191102,2011

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, 1 figure; v2 as published in PRL: title modified, references updated, typos removed, content otherwise unchanged

Scientific paper

10.1103/PhysRevLett.106.191102

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.

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