Errata and Addendum to "Lambda<0 Quantum Gravity in 2+1 Dimensions"

TL;DR

This paper corrects errors in previous works on 2+1 dimensional Lambda<0 quantum gravity, simplifying probability calculations and confirming that black hole creation probabilities remain exponentially small.

Contribution

It provides corrected normalization prescriptions and simplifies the semi-classical probability computation without requiring CFT analysis.

Findings

Corrected probability normalization factors

Simplified semi-classical probability calculations

Confirmed exponential suppression of black hole creation probabilities

Abstract

We correct some errors in the two papers published with the above title in Class. Quant. Grav. 19 (2002). In particular, the correct prescription for computing the probabilities is given, in that appropriate normalization factors are introduced. The resulting computation of the semi-classical limit of probabilities actually becomes much simpler, and no CFT analysis is necessary. In spite of some mistakes, the conclusions of these two papers are to a large extent unchanged. In particular, we still get an exponentially small answer exp(-beta*M) for the black hole creation-evaporation probability.