Vanishing of the Cosmological Constant in Stabilized Quantum Gravity

TL;DR

This paper demonstrates that in stabilized quantum gravity, the probability distribution for the cosmological constant is sharply peaked at zero, suggesting a natural resolution to the cosmological constant problem through quantum fluctuations.

Contribution

It introduces a stochastic stabilization approach in quantum gravity showing the probability distribution for the cosmological constant peaks at zero due to quantum fluctuations.

Findings

Probability distribution $P()$ peaks at zero

Quantum fluctuations induce the peaking effect

Similar to Baum-Hawking mechanism but quantum-fluctuation-driven

Abstract

It is shown that the probability distribution $P(\lambda)$ for the effective cosmological constant is sharply peaked at $\lambda=0$ in stochastic (or "fifth-time") stabilized quantum gravity. The effect is similar to the Baum-Hawking mechanism, except that it comes about due to quantum fluctuations, rather than as a zeroth-order (in $\hbar$) semiclassical effect.