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Sequestration of vacuum energy and the end of the universe

Kaloper, Nemanja; Padilla, Antonio

Authors

Nemanja Kaloper

Antonio Padilla



Abstract

Recently, we proposed a mechanism for sequestering the standard model vacuum energy that predicts that the Universe will collapse. Here we present a simple mechanism for bringing about this collapse, employing a scalar field whose potential is linear and becomes negative, providing the negative energy density required to end the expansion. The slope of the potential is chosen to allow for the expansion to last until the current Hubble time, about 10 10 years, to accommodate our Universe. Crucially, this choice is technically natural due to a shift symmetry. Moreover, vacuum energy sequestering selects radiatively stable initial conditions for the collapse, which guarantee that immediately before the turnaround the Universe is dominated by the linear potential which drives an epoch of accelerated expansion for at least an e fold. Thus, a single, technically natural choice for the slope ensures that the collapse is imminent and is preceded by the current stage of cosmic acceleration, giving a new answer to the “why now?” problem.

Journal Article Type Article
Publication Date Mar 13, 2015
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 114
Issue 10
APA6 Citation Kaloper, N., & Padilla, A. (2015). Sequestration of vacuum energy and the end of the universe. Physical Review Letters, 114(10), doi:10.1103/PhysRevLett.114.101302
DOI https://doi.org/10.1103/PhysRevLett.114.101302
Publisher URL http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.101302
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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