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dc.contributor.author | Popov A. | |
dc.date.accessioned | 2018-09-17T20:46:35Z | |
dc.date.available | 2018-09-17T20:46:35Z | |
dc.date.issued | 2004 | |
dc.identifier.issn | 0556-2821 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/134034 | |
dc.description.abstract | Analytical approximations for 〈φ<sup>2</sup>〉 of a quantized scalar field in ultrastatic asymptotically flat spacetimes are obtained. The field is assumed to be both massive and massless, with an arbitrary coupling ξ to the scalar curvature, and in a zero or nonzero temperature vacuum state. The expression for 〈φ<sup>2</sup>〉 is divided into low- and high-frequency parts. The expansion for the high-frequency contribution to this quantity is obtained. This expansion is analogous to the DeWitt-Schwinger one. As an example, the low-frequency contribution to 〈φ<sup>2</sup>〉 is calculated on the background of the small perturbed flat spacetime in a quantum state corresponding to the Minkowski vacuum at the asymptotic. The limits of the applicability of these approximations are discussed. | |
dc.relation.ispartofseries | Physical Review D - Particles, Fields, Gravitation and Cosmology | |
dc.title | Analytical approximation for 〈φ<sup>2</sup>〉 of a quantized scalar field in ultrastatic asymptotically flat spacetimes | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 8 | |
dc.relation.ispartofseries-volume | 70 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 084047 | |
dc.source.id | SCOPUS05562821-2004-70-8-SID84927741226 |