Derivative Expansion in Quantum Theory of Gravitation

TL;DR

This paper explores a quantum gravity framework invariant under specific symmetries, enabling derivative expansion despite the cosmological term's interference in Einstein gravity.

Contribution

It introduces a quantum gravity approach invariant under volume-preserving diffeomorphism and Weyl transformation, facilitating derivative expansion.

Findings

A new symmetry-invariant quantum gravity model.

Overcomes limitations posed by the cosmological term.

Enables derivative expansion in quantum gravity.

Abstract

The cosmological term prevents perturbation based on derivative expansion in Einstein gravity. We consider quantum theory of gravitation invariant under volume-preserving diffeomorphism and Weyl transformation, which is suitable for derivative expansion.