Lorentz Anomaly and 1+1-Dimensional Radiating Black Holes

TL;DR

This paper investigates the radiation from 1+1-dimensional chiral black holes, revealing a non-trivial dependence on a renormalization parameter due to the Lorentz anomaly, which was absent in simpler models.

Contribution

It introduces an improved semiclassical approximation that uncovers the Lorentz anomaly's impact on black hole radiation in 1+1 dimensions.

Findings

Discovered a dependence on a renormalization parameter in the radiation spectrum.

Identified differences between naive and improved semiclassical approximations.

Enhanced understanding of anomaly effects in low-dimensional quantum gravity.

Abstract

The radiation from the black holes of a 1+1-dimensional chiral quantum gravity model is studied. Most notably, a non-trivial dependence on a renormalization parameter that characterizes the anomaly relations is uncovered in an improved semiclassical approximation scheme; this dependence is not present in the naive semiclassical approximation.