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Paper detail

Entropy and Topology for Gravitational Instantons

In this work a relation between topology and thermodynamical features of gravitational instantons is shown. The expression for the Euler characteristic, through the Gauss-Bonnet integral, and the one for the entropy of gravitational instantons are proposed in a form that makes the relation between them self-evident. A new formulation of the Bekenstein-Hawking formula, where the entropy and the Euler characteristic are related by $S=χA/8$, is obtained. This formula provides the correct results for a wide class of gravitational instantons described by both spherically and axially symmetric metrics.

preprint1997arXivOpen access
Stefano LiberatiGiuseppe Pollifrone
gr-qchep-th
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Stefano LiberatiGiuseppe Pollifrone

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