Dust shell in effective loop quantum black hole model

TL;DR

This paper investigates the dynamics of a dust shell in an effective loop quantum gravity black hole model, deriving and numerically solving the evolution equations to understand quantum-corrected gravitational collapse.

Contribution

It introduces a comprehensive framework including the diffeomorphism constraint and boundary terms, leading to a reduced action with novel dynamical equations for the dust shell.

Findings

Numerical solutions reveal quantum effects on shell dynamics.

The approach improves upon previous models by including additional constraints.

Continuity properties of the metric are analyzed in the quantum-corrected context.

Abstract

In this work, the dynamics of a dust shell in an effective theory of spherically symmetric gravity containing quantum corrections from loop quantum gravity is investigated. To provide a consistent framework for including the dust, we go beyond the standard formulation of the effective theory by introducing an action that includes not only the effective Hamiltonian constraint, but also the diffeomorphism constraint, along with appropriate gauge-fixing and boundary terms. By adding the dust shell action and substituting vacuum solutions for the interior and exterior regions, we derive a reduced action in which only the shell radius $\mathfrak{x}$ and the exterior black hole mass appear as dynamical variables. Varying the reduced action yields the evolution equation for $\mathfrak{x}$, which is then solved numerically to explore the dynamical properties of the dust shell and the continuity properties of the metric. Finally, our approach is compared with previous studies to highlight key differences and improvements.