Amb motiu del tancament d'estiu, la validació de documents es reprendrà a partir del 28 d'agost de 2026. Disculpeu les molèsties.
Con motivo del cierre de verano, la validación de documentos se reanudará a partir del 28 de agosto de 2026. Disculpad las molestias
Due to the summer closure, document validation will resume starting August 28, 2026. We apologize for any inconvenience.

Files

79629.pdf (2.43 MB)

Document type

Article

Version

Published version

Publication date

1994

All rights reserved

Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/12411

Semiclassical equations for weakly inhomogeneous cosmologies

Journal Title

Authors

Director/Tutor

Journal ISSN

Volume Title

Related resource

http://dx.doi.org/10.1103/PhysRevD.49.1861

Abstract

The in-in effective action formalism is used to derive the semiclassical correction to Einsteins equations due to a massless scalar quantum field conformally coupled to small gravitational perturbations in spatially flat cosmological models. The vacuum expectation value of the stress tensor of the quantum field is directly derived from the renormalized in-in effective action. The usual in-out effective action is also discussed and it is used to compute the probability of particle creation. As one application, the stress tensor of a scalar field around a static cosmic string is derived and the back-reaction effect on the gravitational field of the string is discussed.

Subject

Cosmologia, Relativitat general (Física), Teoria quàntica de camps, Equacions d'Einstein, Materials inhomogenis

Subject (English)

Cosmology, General relativity (Physics), Quantum field theory, Einstein field equations, Inhomogeneous materials

Citation

Collections

Articles publicats en revistes (Física de la Matèria Condensada)

Citation

CAMPOS, Antonio and VERDAGUER OMS, Enric. Semiclassical equations for weakly inhomogeneous cosmologies. Physical Review D. 1994. Vol. 49, num. 4, pags. 1861-1880. ISSN 0556-2821. [consulted: 12 of August of 2026]. Available at: https://hdl.handle.net/2445/12411

Export metadata

JSON - METS

Share record