Quantum Gravity Solution To The Cosmological Constant Problem

TL;DR

This paper proposes a nonlocal quantum gravity theory that addresses the cosmological constant problem by suppressing vacuum fluctuations through specific energy scales, maintaining finiteness and unitarity.

Contribution

It introduces a novel nonlocal quantum gravity framework with distinct energy scales to control vacuum and matter fluctuations, offering a potential solution to the cosmological constant problem.

Findings

The theory is finite and unitary to all orders of perturbation.

Vacuum fluctuations are suppressed by a low-energy scale, mbda_{Gvac} < 2.4^{-3} eV.

Matter loops are controlled by a higher energy scale, mbda_{GM} < 1-10 TeV.

Abstract

A nonlocal quantum gravity theory is presented which is finite and unitary to all orders of perturbation theory. Vertex form factors in Feynman diagrams involving gravitons suppress graviton and matter vacuum fluctuation loops by introducing a low-energy gravitational scale, \Lambda_{Gvac} < 2.4\times 10^{-3} eV. Gravitons coupled to non-vacuum matter loops and matter tree graphs are controlled by a vertex form factor with the energy scale, \Lambda_{GM} < 1-10 TeV.