William T. Emond
Well-tempered cosmology
Emond, William T.; Li, Chunhao; Saffin, Paul M.; Zhou, Shuang-Yong
Abstract
We examine an approach to cosmology, known as Well-Tempering, that allows for a de Sitter phase whose expansion is independent of the cosmological constant. Starting from a generic scalar-tensor theory compatible with the recent gravitational wave observation, we impose the Well-Tempering conditions and derive a system that is capable of tuning away the cosmological constant within a sub-class of Horndeski theory, where the scalar has a canonical kinetic term and a general potential. This scenario improves upon the Fab-Four approach by allowing a standard fluid-cosmology before entering the de Sitter phase, and we present an explicit example of our general solution.
Citation
Emond, W. T., Li, C., Saffin, P. M., & Zhou, S. (2019). Well-tempered cosmology. Journal of Cosmology and Astroparticle Physics, 2019(05), https://doi.org/10.1088/1475-7516/2019/05/038
Journal Article Type | Article |
---|---|
Acceptance Date | May 7, 2019 |
Online Publication Date | May 22, 2019 |
Publication Date | May 22, 2019 |
Deposit Date | May 24, 2019 |
Publicly Available Date | May 23, 2020 |
Journal | Journal of Cosmology and Astroparticle Physics |
Electronic ISSN | 1475-7516 |
Publisher | IOP Publishing |
Peer Reviewed | Peer Reviewed |
Volume | 2019 |
Issue | 05 |
Article Number | 038 |
DOI | https://doi.org/10.1088/1475-7516/2019/05/038 |
Keywords | Astronomy and Astrophysics |
Public URL | https://nottingham-repository.worktribe.com/output/2088982 |
Publisher URL | https://iopscience.iop.org/article/10.1088/1475-7516/2019/05/038 |
Files
1812.05480
(407 Kb)
PDF
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