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Quantum evolution according to real clocks
Inigo L. Egusquiza, Luis J. Garay, Jose M. Raya
We characterize good clocks, which are naturally subject to fluctuations, in statistical terms. We also obtain the master equation that governs the evolution of quantum systems acc…
Thermal properties of spacetime foam
Luis J. Garay
Spacetime foam can be modeled in terms of nonlocal effective interactions in a classical nonfluctuating background. Then, the density matrix for the low-energy fields evolves, in t…
Thiemann transform for gravity with matter fields
Luis J. Garay, Guillermo A. Mena Marugan
The generalised Wick transform discovered by Thiemann provides a well-established relation between the Euclidean and Lorentzian theories of general relativity. We extend this Thiem…
Wormhole effective interactions in anti-de Sitter spacetime
C. Barcelo, L. J. Garay
The effects of asymptotically anti-de Sitter wormholes in low-energy field theory are calculated in full detail for three different matter contents: a conformal scalar field, an el…
Spacetime foam as a quantum thermal bath
Luis J. Garay
An effective model for the spacetime foam is constructed in terms of nonlocal interactions in a classical background. In the weak-coupling approximation, the evolution of the low-e…