Composite graviton self-interactions in a model of emergent gravity
Abstract
We consider a theory of scalars minimally coupled to an auxiliary background metric. The theory is generally covariant and subject to the constraint of vanishing energy-momentum tensor. Eliminating the auxiliary metric leads to a reparametrization invariant, nonpolynomial, metric-independent action for the scalar fields. Working in the limit of a large number of physical scalars, a composite massless spin-2 state, the graviton, was identified in previous work, in a two-into-two scalar scattering process. Here, we further explore the possibility that dynamical emergent gravity is a natural feature of generally covariant quantum field theories, by studying the self-interactions of the emergent composite graviton. We show that the fine-tuning previously imposed to ensure the vanishing of the cosmological constant, as well as the existence of the massless spin-2 state, also assures that the emergent graviton’s cubic self-interactions are consistent with those of Einstein’s general relativity, up to higher-derivative corrections. We also demonstrate in a theory with more than one type of scalar that the composite graviton coupling is universal.
- Authors:
-
- College of William and Mary, Williamsburg, VA (United States). High Energy Theory Group, Dept. of Physics
- Univ. of Virginia, Charlottesville, VA (United States). Dept. of Physics
- Publication Date:
- Research Org.:
- United States Dept. of the Navy, North Charleston, SC (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1461228
- Alternate Identifier(s):
- OSTI ID: 1545798
- Grant/Contract Number:
- SC0007894
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 98; Journal Issue: 2; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Carone, Christopher D., Claringbold, Tangereen V. B., and Vaman, Diana. Composite graviton self-interactions in a model of emergent gravity. United States: N. p., 2018.
Web. doi:10.1103/physrevd.98.024041.
Carone, Christopher D., Claringbold, Tangereen V. B., & Vaman, Diana. Composite graviton self-interactions in a model of emergent gravity. United States. doi:10.1103/physrevd.98.024041.
Carone, Christopher D., Claringbold, Tangereen V. B., and Vaman, Diana. Mon .
"Composite graviton self-interactions in a model of emergent gravity". United States. doi:10.1103/physrevd.98.024041.
@article{osti_1461228,
title = {Composite graviton self-interactions in a model of emergent gravity},
author = {Carone, Christopher D. and Claringbold, Tangereen V. B. and Vaman, Diana},
abstractNote = {We consider a theory of scalars minimally coupled to an auxiliary background metric. The theory is generally covariant and subject to the constraint of vanishing energy-momentum tensor. Eliminating the auxiliary metric leads to a reparametrization invariant, nonpolynomial, metric-independent action for the scalar fields. Working in the limit of a large number of physical scalars, a composite massless spin-2 state, the graviton, was identified in previous work, in a two-into-two scalar scattering process. Here, we further explore the possibility that dynamical emergent gravity is a natural feature of generally covariant quantum field theories, by studying the self-interactions of the emergent composite graviton. We show that the fine-tuning previously imposed to ensure the vanishing of the cosmological constant, as well as the existence of the massless spin-2 state, also assures that the emergent graviton’s cubic self-interactions are consistent with those of Einstein’s general relativity, up to higher-derivative corrections. We also demonstrate in a theory with more than one type of scalar that the composite graviton coupling is universal.},
doi = {10.1103/physrevd.98.024041},
journal = {Physical Review D},
number = 2,
volume = 98,
place = {United States},
year = {2018},
month = {7}
}
DOI: 10.1103/physrevd.98.024041
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