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Scalar wormholes in a cosmological setting and their instability
Sushkov, Sergey V.; Zhang, Yuan-Zhong; Sushkov, SV , Kazan VI Lenin State Univ, Dept Gen Relativ & Gravitat, Kremlevskaya Str 18, Kazan 420008, Russia
2008
发表期刊PHYSICAL REVIEW D
ISSN1550-7998
卷号77期号:2页码:-
摘要We construct exact nonstatic nonhomogeneous spherically symmetric solutions in the theory of gravity with a scalar field possessing the exponential potential. The solution of particular interest corresponds to the scalar field with negative kinetic energy, i.e. a ghost, and represents two asymptotically homogeneous spatially flat universes connected by a throat. We interpret this solution as a wormhole in the cosmological setting. Both the universes and the wormhole throat are simultaneously expanding with acceleration. The character of expansion qualitatively depends on the wormhole's mass m. For m = 0 the expansion goes exponentially, so that the corresponding spacetime configuration represents two de Sitter universes joining by the throat. For m > 0 the expansion has the power character, so that one has the inflating wormhole connecting two homogeneous spatially flat universes expanding according to the power law into the final singularity. The stability analysis of the nonstatic wormholes reveals their instability against linear spherically symmetric perturbations.
部门归属[Sushkov, SV] Kazan VI Lenin State Univ, Dept Gen Relativ & Gravitat, Kazan 420008, Russia; [Zhang, YZ] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Power-law Inflation General-relativity Field Universes Dark Energy Traversable Wormholes Black-holes Gravity Models Throat
学科领域Physics
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收录类别SCI
WOS记录号WOS:000252864000092
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被引频次:25[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5603
专题理论物理所1978-2010年知识产出
通讯作者Sushkov, SV , Kazan VI Lenin State Univ, Dept Gen Relativ & Gravitat, Kremlevskaya Str 18, Kazan 420008, Russia
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Sushkov, Sergey V.,Zhang, Yuan-Zhong,Sushkov, SV , Kazan VI Lenin State Univ, Dept Gen Relativ & Gravitat, Kremlevskaya Str 18, Kazan 420008, Russia. Scalar wormholes in a cosmological setting and their instability[J]. PHYSICAL REVIEW D,2008,77(2):-.
APA Sushkov, Sergey V.,Zhang, Yuan-Zhong,&Sushkov, SV , Kazan VI Lenin State Univ, Dept Gen Relativ & Gravitat, Kremlevskaya Str 18, Kazan 420008, Russia.(2008).Scalar wormholes in a cosmological setting and their instability.PHYSICAL REVIEW D,77(2),-.
MLA Sushkov, Sergey V.,et al."Scalar wormholes in a cosmological setting and their instability".PHYSICAL REVIEW D 77.2(2008):-.
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