Jishnu Bhattacharyya
Revisiting the cuscuton as a Lorentz-violating gravity theory
Bhattacharyya, Jishnu; Coates, Andrew; Colombo, Mattia; Gümrükçüoğlu, A. Emir; Sotiriou, Thomas P.
Authors
Andrew Coates
Mattia Colombo
A. Emir Gümrükçüoğlu
THOMAS SOTIRIOU Thomas.Sotiriou@nottingham.ac.uk
Professor of Gravitational Physics
Abstract
The cuscuton is a scalar field with infinite speed of propagation. It was introduced in the context of cosmology but it has also been claimed to resemble Horava gravity in a certain limit. Here we revisit the cuscuton theory as a Lorentz-violating gravity theory. We clarify its relation with Horava gravity and Einstein-æther theory, analyze its causal structure, and consider its initial value formulation. Finally, we discuss to which extent the cuscuton theory can be used as a proxy for Horava gravity in the context of gravitational collapse and formation of universal horizons.
Citation
Bhattacharyya, J., Coates, A., Colombo, M., Gümrükçüoğlu, A. E., & Sotiriou, T. P. (2018). Revisiting the cuscuton as a Lorentz-violating gravity theory. Physical Review D, 97(6), https://doi.org/10.1103/PhysRevD.97.064020
Journal Article Type | Article |
---|---|
Acceptance Date | Feb 16, 2018 |
Publication Date | Mar 20, 2018 |
Deposit Date | Apr 12, 2018 |
Publicly Available Date | Apr 12, 2018 |
Journal | Physical Review D |
Print ISSN | 2470-0010 |
Electronic ISSN | 2470-0010 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 97 |
Issue | 6 |
DOI | https://doi.org/10.1103/PhysRevD.97.064020 |
Public URL | https://nottingham-repository.worktribe.com/output/920565 |
Publisher URL | https://journals.aps.org/prd/abstract/10.1103/PhysRevD.97.064020 |
Files
PhysRevD.97.064020.pdf
(197 Kb)
PDF
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