Entropy and the cosmological constant: a spacetime-foam approach

TL;DR

This paper models spacetime foam using wormholes to analyze quantum fluctuations, exploring their effects on entropy and the cosmological constant within a semiclassical framework.

Contribution

It introduces a simple wormhole-based spacetime foam model to compute quantum fluctuation energy and its implications for entropy and the cosmological constant.

Findings

Casimir-like energy of quantum fluctuations calculated

Probability of spacetime foam configurations estimated

Implications for Bekenstein-Hawking entropy and cosmological constant discussed

Abstract

A simple model of spacetime foam, made by N wormholes in a semiclassical approximation, is taken under examination. The Casimir-like energy of the quantum fluctuation of such a model and its probability of being realized are computed. Implications on the Bekenstein-Hawking entropy and the cosmological constant are considered.