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dc.contributor.authorMartín Menéndez, Rosariocat
dc.contributor.authorVerdaguer Oms, Enric, 1950-cat
dc.description.abstractThe 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.eng
dc.publisherThe American Physical Societyeng
dc.relation.isformatofReproducció digital del document publicat en format paper, proporcionada per PROLA i
dc.relation.ispartofPhysical Review D, 2000, vol. 61, núm. 12, p. 124024-1-124024-25cat
dc.rights(c) The American Physical Society, 2000eng
dc.sourceArticles publicats en revistes (Física de la Matèria Condensada)-
dc.subject.classificationRelativitat (Física)cat
dc.subject.classificationGravetat quànticacat
dc.subject.classificationEspais generalitzatscat
dc.subject.classificationFluctuacions (Física)cat
dc.subject.otherRelativity (Physics)eng
dc.subject.otherQuantum gravityeng
dc.subject.otherGeneralized spaceseng
dc.subject.otherFluctuations (Physics)eng
dc.titleStochastic semiclassical fluctuations in Minkowski spacetimeeng
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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