Comparing decay rates for black holes and D-branes

TL;DR

This paper compares the emission rates of low energy quanta from D-brane systems and their corresponding black hole geometries, finding agreement between quantum and classical calculations at leading order.

Contribution

It provides the first leading order comparison of emission rates from D-branes and black holes, confirming their consistency in the weak and strong coupling regimes.

Findings

Quantum emission rate matches classical Hawking rate

Agreement observed at leading order in coupling

Supports the correspondence between D-branes and black hole physics

Abstract

We compute the leading order (in coupling) rate of emission of low energy quanta from a slightly nonextremal system of 1 and 5 D-branes. We also compute the classical cross-section, and hence the Hawking emission rate, for low energy scalar quanta for the black hole geometry that corresponds to these branes (at sufficiently strong coupling). These rates are found to agree with each other.