RT Journal Article T1 Spacetime foam as a quantum thermal bath A1 Garay Elizondo, Luis Javier AB 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. PB American Physical Society SN 0031-9007 YR 1998 FD 1998-03-23 LK https://hdl.handle.net/20.500.14352/59544 UL https://hdl.handle.net/20.500.14352/59544 LA eng NO © 1998 The American Physical Society.I am very grateful to G. A. Mena Marugán, P. F. González-Díaz, C. Barceló, C. Cabrillo, and J. I. Cirac for helpful discussions. I was supported by funds provided by DGICYT and MEC (Spain) under Contract Adjunct to the Project No. PB94–0107. NO DGICYT (Spain) NO MEC (Spain) DS Docta Complutense RD 13 may 2025