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Emergent modified gravity.
Emergent modified gravity.
- Source :
-
Classical & Quantum Gravity . 5/2/2024, Vol. 41 Issue 9, p1-18. 18p. - Publication Year :
- 2024
-
Abstract
- A complete canonical formulation of general covariance makes it possible to construct new modified theories of gravity that are not of higher-curvature form, as shown here in a spherically symmetric setting. The usual uniqueness theorems are evaded by using a crucial and novel ingredient, allowing for fundamental fields of gravity distinct from an emergent space-time metric that provides a geometrical structure to all solutions. As specific examples, there are new expansion-shear couplings in cosmological models, a form of modified Newtonian dynamics can appear in a space-time covariant theory without introducing extra fields, and related effects help to make effective models of canonical quantum gravity fully consistent with general covariance. [ABSTRACT FROM AUTHOR]
- Subjects :
- *GRAVITY
*QUANTUM gravity
*SPACETIME
Subjects
Details
- Language :
- English
- ISSN :
- 02649381
- Volume :
- 41
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Classical & Quantum Gravity
- Publication Type :
- Academic Journal
- Accession number :
- 176466568
- Full Text :
- https://doi.org/10.1088/1361-6382/ad36a8