Vacuum energy sequestering: The framework and its cosmological consequences

Kaloper, Nemanja; Padilla, Antonio

Abstract

Recently we suggested a reformulation of general relativity which completely sequesters from gravity all of the vacuum energy from a protected matter sector, assumed to contain the standard model. Here we elaborate further on the mechanism, presenting additional details of how it cancels all loop corrections and renders all contributions from phase transitions automatically small. We also consider cosmological consequences in more detail and show that the mechanism is consistent with a variety of inflationary models that make a universe big and old. We discuss in detail the underlying assumptions behind the dynamics of our proposal, and elaborate on the relationship of the physical interpretation of divergent operators in quantum field theory and the apparent “acausality” which our mechanism seems to entail, which we argue is completely harmless. It is merely a reflection of the fact that any UV sensitive quantity in quantum field theory cannot be calculated from first principles, but is an input whose numerical value must be measured. We also note that since the universe should be compact in spacetime, and so will collapse in the future, the current phase of acceleration with wDE≈−1 is just a transient. This could be tested by future cosmological observations.

Citation

Kaloper, N., & Padilla, A. (2014). Vacuum energy sequestering: The framework and its cosmological consequences. Physical Review D - Particles, Fields, Gravitation and Cosmology, 90(8), https://doi.org/10.1103/physrevd.90.084023

• Journal Article Type: Article
• Acceptance Date: Sep 24, 2014
• Online Publication Date: Oct 14, 2014
• Publication Date: Oct 15, 2014
• Deposit Date: Nov 25, 2020
• Publicly Available Date: Dec 7, 2020
• Journal: Physical Review D
• Print ISSN: 1550-7998
• Electronic ISSN: 1550-2368
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 90
• Issue: 8
• Article Number: 084023
• DOI: https://doi.org/10.1103/physrevd.90.084023
• Public URL: https://nottingham-repository.worktribe.com/output/4904209
• Publisher URL: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.90.084023
• Additional Information: © 2014 American Physical Society