Editing Loop quantum gravity (section)

===Hawking radiation in loop quantum gravity===
{{main|Hawking radiation}}
A detailed study of the quantum geometry of a black hole horizon has been made using loop quantum gravity.{{sfn|Ashtekar|Baez|Corichi|Krasnov|1998|pp=904–907}} Loop-quantization does not reproduce the result for [[black hole entropy]] originally discovered by Bekenstein and Hawking, unless one chooses the value of the [[Immirzi parameter]] to cancel out another constant that arises in the derivation. However, it led to the computation of higher-order corrections to the entropy and radiation of black holes.

Based on the fluctuations of the horizon area, a quantum black hole exhibits deviations from the Hawking spectrum that would be observable were [[X-ray]]s from Hawking radiation of evaporating [[primordial black holes]] to be observed.{{sfn|Ansari|2007|pp=179–212}} The quantum effects are centered at a set of discrete and unblended frequencies highly pronounced on top of Hawking radiation spectrum.{{sfn|Ansari|2008|pp=635–644}}