A Spacetime Foam approach to the cosmological constant and entropy

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.

Uses RevTeX, 24 pages, Appendix deleted and some corrections inserted. Final results unchanged

References in corpus (4)

• Gravity-wave interferometers as probes of a low-energy effective quantum gravity
• Entropy from the foam
• On Quantum Nature of Black-Hole Spacetime: A Possible New Source of Intense Radiation
• Virtual dipoles and large fluctuations in quantum gravity

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• The Quantum Field Theory Boundaries Applicability and Black Holes Thermodynamics
• The quantum emission spectra of rapidly-rotating Kerr black holes: discrete or continuous?
• The vacuum state of quantum gravity contains large virtual masses
• Entropy from the foam II
• Spacetime Foam Model of the Schwarzschild Horizon
• Dark energy from topology change induced by microscopic Gauss-Bonnet wormholes
• Multigravity and Space Time Foam
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• Quantum metrics with very low action in $R+R^2$ gravity
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• Metrics with zero and almost-zero Einstein action in quantum gravity
• Space Time Foam: a ground state candidate for Quantum Gravity
• Minimal Length and the Existence of Some Infinitesimal Quantities in Quantum Theory and Gravity
• Wormholes and Spacetime Foam: an approach to the Cosmological Constant and Entropy
• A coherent approach to Spacetime Foam
• Can Reissner-Nordström wormholes be considered for Spacetime Foam formation?