Two-time alternative to the Ashtekar-Olmedo-Singh black hole interior

TL;DR

This paper explores a generalized loop quantum cosmology model for black hole interiors that introduces two times, analyzing their consistency and how to obtain a well-defined single-time effective geometry.

Contribution

It proposes a more general polymerization scheme leading to two times and demonstrates how to reconcile them into a single effective geometry.

Findings

Two times naturally appear in the model.

A consistent single-time geometry can be achieved.

The freedom to define time origins resolves redundancy.

Abstract

We investigate the viability of a recently proposed generalization of the Ashtekar-Olmedo-Singh spacetime for the effective description of the interior region of a Schwarzschild black hole within the framework of loop quantum cosmology. The approach is based on a choice of polymerization parameters that is more general than the ones previously considered in the literature and that results in the natural appearance of two times to describe the solutions. If one is interested in examining the physics derived from this model, it is fundamental to ensure that one can attain a well-defined effective geometry in the whole region under consideration, in particular as regards the redundancy of the two times, which one needs to express in terms of a single time coordinate. In order to determine whether this requirement is met, we analyze the definition of these times and their relation. We show that one can reach an acceptable interior spacetime geometry by exploiting the freedom to define the origins of the two times independently.