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Nandi, KK; Zhang, YZ; Kumar, KBV; Nandi, KK , Univ N Bengal, Dept Math, Darjeeling 734430, W Bengal, India.
Semiclassical and quantum field theoretic bounds for traversable Lorentzian stringy wormholes
发表期刊PHYSICAL REVIEW D
关键词Brans-dicke Wormholes General-relativity Black-holes Scalar Fields Natural Wormholes Horizon Problem Ellis Geometry Energy Cosmology Spacetime
摘要A lower bound on the size of a Lorentzian wormhole can be obtained by semiclassically introducing the Planck cutoff on the magnitude of tidal forces (Horowitz-Ross constraint). Also, an upper bound is provided by the quantum field theoretic constraint in the form of the Ford-Roman Quantum Inequality for massless minimally coupled scalar fields. To date, however, exact static solutions belonging to this scalar field theory have not been worked out to verify these bounds. To fill this gap, we examine the wormhole features of two examples from the Einstein frame description of the vacuum low energy string theory in four dimensions which is the same as the minimally coupled scalar field theory. Analyses in this paper support the conclusion of Ford and Roman that wormholes in this theory can have sizes that are indeed only a few order of magnitudes larger than the Planck scale. It is shown that the two types of bounds are also compatible. In the process, we point out a "wormhole" analog of naked black holes.
2004
ISSN0556-2821
卷号70期号:6页码:-
学科领域Physics
收录类别SCI
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被引频次:10[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/311006/14005
专题理论物理所科研产出_SCI论文
通讯作者Nandi, KK , Univ N Bengal, Dept Math, Darjeeling 734430, W Bengal, India.
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Nandi, KK,Zhang, YZ,Kumar, KBV,et al. Semiclassical and quantum field theoretic bounds for traversable Lorentzian stringy wormholes[J]. PHYSICAL REVIEW D,2004,70(6):-.
APA Nandi, KK,Zhang, YZ,Kumar, KBV,&Nandi, KK , Univ N Bengal, Dept Math, Darjeeling 734430, W Bengal, India..(2004).Semiclassical and quantum field theoretic bounds for traversable Lorentzian stringy wormholes.PHYSICAL REVIEW D,70(6),-.
MLA Nandi, KK,et al."Semiclassical and quantum field theoretic bounds for traversable Lorentzian stringy wormholes".PHYSICAL REVIEW D 70.6(2004):-.
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