QCD analogy for quantum gravity
@article{Holdom2015QCDAF,
title={QCD analogy for quantum gravity},
author={Bob Holdom and Jing Ren},
journal={Physical Review D},
year={2015},
volume={93},
pages={124030}
}Quadratic gravity presents us with a renormalizable, asymptotically free theory of quantum gravity. When its couplings grow strong at some scale, as in QCD, then this strong scale sets the Planck mass. QCD has a gluon that does not appear in the physical spectrum. Quadratic gravity has a spin-2 ghost that we conjecture does not appear in the physical spectrum. We discuss how the QCD analogy leads to this conjecture and to the possible emergence of general relativity. Certain aspects of the QCD…
69 Citations
Gauge assisted quadratic gravity: A framework for UV complete quantum gravity
- PhysicsPhysical Review D
- 2018
We discuss a variation of quadratic gravity in which the gravitational interaction remains weakly coupled at all energies, but is assisted by a Yang-Mills gauge theory which becomes strong at the…
Infrared behavior of Weyl Gravity
- PhysicsJournal of Physics: Conference Series
- 2021
In this paper, we introduce and motivate the studies of Quantum Weyl Gravity (also known as Conformal Gravity). We discuss some appealing features of this theory both on classical and quantum level.…
Gravity as a Quantum Field Theory
- PhysicsSymmetry
- 2023
Classical gravity is understood as the geometry of spacetime, and it seems very different from the other known interactions. In this review, I will instead stress the analogies: Like strong…
Quadratic Gravity
- PhysicsFront. Phys.
- 2018
Adding terms quadratic in the curvature to the Einstein-Hilbert action renders gravity renormalizable. This property is preserved in the presence of the most general renormalizable couplings with…
Ultra-Planckian scattering from a QFT for gravity
- PhysicsPhysical Review D
- 2022
Astonishing cancellations take place in the calculation of high-energy scattering cross sections in quantum quadratic gravity, a quantum field theory for gravity. Tree-level differential cross…
Renormalizability and Newtonian potential in scale-invariant gravity
- PhysicsInternational Journal of Modern Physics D
- 2018
There is a conjecture that renormalizable higher-derivative gravity has a finite classical potential at the origin. In this work, we show clearly that the scale-invariant gravity (SIG) satisfies the…
The Asymptotic Safety Program for Quantum Gravity
- Physics
- 2022
In this project, we explore asymptotically safe pure gravity as a candidate for a quantum field theory of gravity. We first present Wilson-Kadanoff renormalization before exploring the existence of…
Lecture notes: Functional Renormalisation Group and Asymptotically Safe Quantum Gravity
- Physics
- 2020
These lecture notes give an introduction to the functional renormalisation group and asymptotically safe quantum gravity. We cover the basics of generating functionals in quantum field theories and…
An Asymptotically Safe Guide to Quantum Gravity and Matter
- PhysicsFront. Astron. Space Sci.
- 2019
Asymptotic safety generalizes asymptotic freedom and could contribute to understanding physics beyond the Standard Model. It is a candidate scenario to provide an ultraviolet extension for the…
Conformal model of gravitons
- Physics
- 2017
In the description of general covariance, the vierbein and the Lorentz connection can be treated as independent fundamental fields. With the usual gauge Lagrangian, the Lorentz connection is…
References
SHOWING 1-10 OF 10 REFERENCES
Scholarpedia 10
- 32243
- 2015
Living Rev
- Relativity 7, 5
- 2004
For a review of QCD Green functions, see R. Alkofer and L. von Smekal
- Phys. Rep
- 2001
) ; G . Narain and R . Anishetty
- J . Phys . Conf . Ser .
- 2012
) . [ 28 ] A . Salvio and A . Strumia
- Eur . Phys . J . C Phys . Rev . D
Found
- Phys. 37, 532 (2007); C. M. Bender and P. D. Mannheim, Phys. Rev. Lett. 100, 110402
- 2008
Nuovo Cimento Soc
- Ital. Fis. 50B, 303
- 1979
) . [ 43 ] N . Vandersickel and D . Zwanziger
- 1989
Commun
- Math. Phys. 60, 7
- 1978