Phys. Rev. Lett. 80, 2508–2511 (1998)Spacetime Foam as a Quantum Thermal BathReceived 12 January 1998; published in the issue dated 23 March 1998 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. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.80.2508
DOI:
10.1103/PhysRevLett.80.2508
PACS:
04.60.-m, 03.65.Bz, 04.20.Gz, 04.70.Dy
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