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From the corner proposal for quantum gravity to the area law

Jerzy Kowalski-Glikman1,2,* and Ludovic Varrin1,†

  • *Contact author: jerzy.kowalski-glikman@uwr.edu.pl
  • †Contact author: ludovic.varrin@ncbj.gov.pl
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Phys. Rev. D 114, 046026 – Published 25 August, 2026

DOI: https://doi.org/10.1103/3y65-jhmf

Abstract

We provide an explicit realization of the corner proposal for quantum gravity in the case of spherically symmetric spacetimes in four dimensions, or equivalently, two-dimensional dilaton gravity. We construct coherent states of the quantum corner symmetry group and compute the entanglement entropy relative to these states. We derive the classical corner charges and relate them to operator expectation values in coherent states. For a subset of coherent states that we call classical states, we find that the entanglement entropy exhibits a leading term proportional to the area, recovering the Bekenstein–Hawking area law in the semiclassical limit.

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Phys. Rev. D 114, 046026– Published 25 August, 2026
  • Received 8 June 2026
  • Accepted 20 July 2026
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