The Persistence of the Large Volumes in Black Holes

TL;DR

This paper demonstrates that black holes maintain large interior volumes even with Hawking evaporation, impacting understanding of black hole information loss and firewall paradoxes.

Contribution

It shows that black hole interior volumes remain large during evaporation, including near extremal limits, clarifying misconceptions about extremal black holes and their interior sizes.

Findings

Black hole volumes grow linearly over time even with evaporation

Extremal black holes do not have large interiors, unlike non-extremal ones

Results have implications for the information loss and firewall paradoxes

Abstract

Classically, black holes admit maximal interior volumes that grow asymptotically linearly in time. We show that such volumes remain large when Hawking evaporation is taken into account. Even if a charged black hole approaches the extremal limit during this evolution, its volume continues to grow; although an exactly extremal black hole does not have a "large interior". We clarify this point and discuss the implications of our results to the information loss and firewall paradoxes.