Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1998-01-09
Phys.Rev.Lett. 80 (1998) 2508-2511
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
RevTeX 3.01, 4 pages
Scientific paper
10.1103/PhysRevLett.80.2508
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-energy density matrix is determined by a master equation that predicts loss of quantum coherence. Moreover, spacetime foam can be described by a quantum thermal field that, apart from inducing loss of coherence, gives rise to effects such as gravitational Lamb and Stark shifts as well as quantum damping in the evolution of the low-energy observables.
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