Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/12319
Title: Stochastic semiclassical fluctuations in Minkowski spacetime
Author: Martín Menéndez, Rosario
Verdaguer Oms, Enric, 1950-
Keywords: Relativitat (Física)
Gravetat quàntica
Espais generalitzats
Fluctuacions (Física)
Relativity (Physics)
Quantum gravity
Generalized spaces
Fluctuations (Physics)
Issue Date: 2000
Publisher: The American Physical Society
Abstract: The semiclassical Einstein-Langevin equations which describe the dynamics of stochastic perturbations of the metric induced by quantum stress-energy fluctuations of matter fields in a given state are considered on the background of the ground state of semiclassical gravity, namely, Minkowski spacetime and a scalar field in its vacuum state. The relevant equations are explicitly derived for massless and massive fields arbitrarily coupled to the curvature. In doing so, some semiclassical results, such as the expectation value of the stress-energy tensor to linear order in the metric perturbations and particle creation effects, are obtained. We then solve the equations and compute the two-point correlation functions for the linearized Einstein tensor and for the metric perturbations. In the conformal field case, explicit results are obtained. These results hint that gravitational fluctuations in stochastic semiclassical gravity have a non-perturbative behavior in some characteristic correlation lengths.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevD.61.124024
It is part of: Physical Review D, 2000, vol. 61, núm. 12, p. 124024-1-124024-25
URI: http://hdl.handle.net/2445/12319
ISSN: 0556-2821
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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