A Quantum Gravitational Relaxation of The Cosmological Constant

Abstract

Similar to QCD, general relativity has a $\Theta$ sector due to large diffeomorphisms. We make explicit, for the first time, that the gravitational CP violating $\Theta$ parameter is non-perturbatively related to the cosmological constant. A gravitational pseudoscalar coupling to massive fermions gives rise to general relativity from a topological $B\wedge F$ theory through a chiral symmetry breaking mechanism. We show that a gravitational Peccei-Quinn like mechanism can dynamically relax the cosmological constant.

6 pages

References in corpus (5)

• Black hole entropy in Loop Quantum Gravity
• Quantum gravity with a positive cosmological constant
• Quantum gravity in terms of topological observables
• General relativity with a topological phase: an action principle
• Symmetry and entropy of black hole horizons

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• Quantum gravity and the standard model
• The cosmological BCS mechanism and the Big Bang Singularity
• A Zero-Parameter Extension of General Relativity with Varying Cosmological Constant
• The Chern-Simons Caps for Rotating Black Holes
• Inflationary Birefringence and Baryogenesis
• Vacuum Energy as the Origin of the Gravitational Constant
• Doubly Special Relativity as a Limit of Gravity
• A model for the very early Universe
• A Mesoscopic Quantum Gravity Effect
• Bibliography of Publications related to Classical Self-dual variables and Loop Quantum Gravity