An étude on global vacuum energy sequester

D�Amico, Guido; Kaloper, Nemanja; Padilla, Antonio; Stefanyszyn, David; Westphal, Alexander; Zahariade, George

Abstract

Recently two of the authors proposed a mechanism of vacuum energy sequester as a means of protecting the observable cosmological constant from quantum radiative corrections. The original proposal was based on using global Lagrange multipliers, but later a local formulation was provided. Subsequently other interesting claims of a different non-local approach to the cosmological constant problem were made, based again on global Lagrange multipliers. We examine some of these proposals and find their mutual relationship. We explain that the proposals which do not treat the cosmological constant counterterm as a dynamical variable require fine tunings to have acceptable solutions. Furthermore, the counterterm often needs to be retuned at every order in the loop expansion to cancel the radiative corrections to the cosmological constant, just like in standard GR. These observations are an important reminder of just how the proposal of vacuum energy sequester avoids such problems.

Citation

D’Amico, G., Kaloper, N., Padilla, A., Stefanyszyn, D., Westphal, A., & Zahariade, G. (2017). An étude on global vacuum energy sequester. Journal of High Energy Physics, 2017(9), Article 74. https://doi.org/10.1007/JHEP09%282017%29074

• Journal Article Type: Article
• Acceptance Date: Aug 31, 2017
• Publication Date: Sep 18, 2017
• Deposit Date: Oct 6, 2017
• Publicly Available Date: Oct 6, 2017
• Journal: Journal of High Energy Physics
• Electronic ISSN: 1029-8479
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 2017
• Issue: 9
• Article Number: 74
• DOI: https://doi.org/10.1007/JHEP09%282017%29074
• Keywords: Classical theories of gravity, Effective field theories
• Public URL: https://nottingham-repository.worktribe.com/output/883397
• Publisher URL: https://doi.org/10.1007/JHEP09(2017)074
• Contract Date: Oct 6, 2017