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Scalar wormholes with nonminimal derivative coupling

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dc.contributor.author Sushkov S.
dc.contributor.author Korolev R.
dc.date.accessioned 2018-09-18T20:07:29Z
dc.date.available 2018-09-18T20:07:29Z
dc.date.issued 2012
dc.identifier.issn 0264-9381
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/136741
dc.description.abstract We consider static spherically symmetric wormhole configurations in a gravitational theory of a scalar field with a potential V() and nonminimal derivative coupling to the curvature described by the term (εg μν + κG μν)φ , μφ ν in the action. We show that the flare-out conditions providing the geometry of a wormhole throat could be fulfilled both if ε = -1 (phantom scalar) and ε= +1 (ordinary scalar). Supposing additionally a traversability, we construct numerical solutions describing traversable wormholes in the model with arbitrary κ, ε=-1 and V(φ) = 0 (no potential). The traversability assumes that the wormhole possesses two asymptotically flat regions with corresponding Schwarzschild masses. We find that asymptotical masses of a wormhole with nonminimal derivative coupling could be positive and/or negative depending on κ. In particular, both masses are positive only provided κ < κ 1≤0; otherwise, one or both wormhole masses are negative. In conclusion, we give qualitative arguments that a wormhole configuration with positive masses could be stable. © 2012 IOP Publishing Ltd.
dc.relation.ispartofseries Classical and Quantum Gravity
dc.title Scalar wormholes with nonminimal derivative coupling
dc.type Article
dc.relation.ispartofseries-issue 8
dc.relation.ispartofseries-volume 29
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS02649381-2012-29-8-SID84859592955


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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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