Anomaly freedom of the vector modes with holonomy corrections in perturbative Euclidean loop quantum gravity

TL;DR

This paper demonstrates that specific holonomy corrections in Euclidean loop quantum gravity can preserve the anomaly-free nature of the constraint algebra during vector mode perturbations, supporting consistent quantum gravity models.

Contribution

It identifies conditions under which holonomy corrections maintain anomaly freedom in the perturbative Euclidean loop quantum gravity framework.

Findings

Derived the Poisson bracket for corrected Hamiltonian and diffeomorphism constraints.

Found specific holonomy correction functions satisfying anomaly-free algebra.

Confirmed the compatibility of non-trivial holonomy corrections with anomaly freedom.

Abstract

We study the perturbation of the effective Hamiltonian constraint with holonomy correction from Euclidean loop quantum gravity. The Poisson bracket between the corrected Hamiltonian constraint and the diffeomorphism constraint is derived for vector modes. Some specific form of the holonomy correction function $f^{i}_{cd}$ is found, which satisfies that the constraint algebra is anomaly-free. This result confirms the possibility of non-trivial holonomy corrections from full theory while preserving anomaly-free constraint algebra in the perturbation framework. It also gives valuable hints on the possible form of holonomy corrections in effective loop quantum gravity.