Entropy from the foam

TL;DR

This paper examines a model of spacetime foam composed of multiple wormholes and demonstrates that the Bekenstein-Hawking entropy can be quantized within this framework, aligning with heuristic predictions.

Contribution

It introduces a simple semiclassical model of spacetime foam with wormholes that supports the quantization of black hole entropy, providing a new perspective on quantum gravity.

Findings

Bekenstein-Hawking entropy is quantized in the model

The model aligns with heuristic entropy calculations

Supports the idea of discrete spacetime structures

Abstract

A simple model of spacetime foam, made by N wormholes in a semiclassical approximation, is taken under examination. We show that the Bekenstein-Hawking entropy is here ``quantized'' in agreement with the heuristic calculation of Bekenstein.