TL;DR
This paper derives the entropy of apparent horizons in quantum gravity using semiclassical states, showing the leading area law and graph-dependent correction terms.
Contribution
It introduces a method to compute horizon entropy in quantum gravity with corrections depending on the regularisation graph.
Findings
Leading entropy proportional to horizon area
Correction terms vary with the regularisation graph
Supports semiclassical approach in quantum gravity
Abstract
The entropy of apparent horizons is derived using coherent states or semiclassical states in quantum gravity. The leading term is proportional to area for large horizons, and the correction terms differ according to the details of the graph which is used to regularise the quantum gravity phase space variables.
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