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Euclidean Quantum Gravity in Light of Spectral Geometry

Giampiero Esposito
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Abstract

A proper understanding of boundary-value problems is essential in the attempt of developing a quantum theory of gravity and of the birth of the universe. The present paper reviews these topics in light of recent developments in spectral geometry, i.e. heat-kernel asymptotics for the Laplacian in the presence of Dirichlet, or Robin, or mixed boundary conditions; completely gauge-invariant boundary conditions in Euclidean quantum gravity; local vs. non-local boundary-value problems in one-loop Euclidean quantum theory via path integrals.

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Giampiero Esposito. 2003-07-23. Euclidean Quantum Gravity in Light of Spectral Geometry. https://arxiv.org/abs/hep-th/0307226

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