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〈φ2〉 for a scalar field in 2D black holes: A new uniform approximation

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dc.contributor.author Frolov V.
dc.contributor.author Sushkov S.
dc.contributor.author Zelnikov A.
dc.date.accessioned 2018-09-17T20:46:30Z
dc.date.available 2018-09-17T20:46:30Z
dc.date.issued 2003
dc.identifier.issn 0556-2821
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/134032
dc.description.abstract We study nonconformal quantum scalar fields and averages of their local observables (such as 〈φ2〉ren and 〈T μv〉ren) in the spacetime of a two-dimensional black hole. In order to get an analytical approximation for these expressions the WKB approximation is often used. We demonstrate that at the horizon the WKB approximation is violated for a nonconformal field, that is, when the field mass or/and the parameter of nonminimal coupling does not vanish. We propose a new "uniform approximation" which solves this problem. We use this approximation to obtain an improved analytical approximation for 〈φ2〉ren in the two-dimensional black hole geometry. We compare the results obtained with numerical calculations. © 2003 The American Physical Society.
dc.relation.ispartofseries Physical Review D
dc.title 〈φ2〉 for a scalar field in 2D black holes: A new uniform approximation
dc.type Article
dc.relation.ispartofseries-issue 10
dc.relation.ispartofseries-volume 68
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS05562821-2003-68-10-SID9344250378


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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