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 |
|