Semiclassical and quantum field theoretic bounds for traversable Lorentzian stringy wormholes

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	Semiclassical and quantum field theoretic bounds for traversable Lorentzian stringy wormholes
	Nandi, KK; Zhang, YZ; Kumar, KBV; Nandi, KK , Univ N Bengal, Dept Math, Darjeeling 734430, W Bengal, India.
刊名	PHYSICAL REVIEW D
	2004
卷号	70 期号:6 页码:-
关键词	Brans-dicke Wormholes General-relativity Black-holes Scalar Fields Natural Wormholes Horizon Problem Ellis Geometry Energy Cosmology Spacetime
ISSN号	0556-2821
英文摘要	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.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000224462000060
公开日期	2012-08-30
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/14005]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Nandi, KK , Univ N Bengal, Dept Math, Darjeeling 734430, W Bengal, India.
推荐引用方式 GB/T 7714	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):-.