منابع مشابه
Asymmetrically Warped Spacetimes
We investigate spacetimes in which the speed of light along flat 4D sections varies over the extra dimensions due to different warp factors for the space and the time coordinates (“asymmetrically warped” spacetimes). The main property of such spaces is that while the induced metric is flat, implying Lorentz invariant particle physics on a brane, bulk gravitational effects will cause apparent vi...
متن کاملStability of Doubly Warped Product Spacetimes
Nonlinear stability for a class of doubly warped spacetimes is proved. The background spacetimes have negative Einstein factors. It shown that for dimension D ≥ 11 there is a full parameter family of solutions to the vacuum Einstein equations which has Kasner-like singularity and Friedmann like asympotics in the future. In particular, these spacetimes have crushing singularity and are globally ...
متن کاملde Sitter Spacetimes from Warped Compactifications of IIB String Theory
We continue our study of codimension two solutions of warped space-time varying compactifications of string theory. In this letter we discuss a non-supersymmetric solution of the classical type IIB string theory with de Sitter gravity on a codimension two uncompactified part of spacetime. A non-zero positive value of the cosmological constant is induced by the presence of non-trivial stringy mo...
متن کاملOn the causal properties of warped product spacetimes
It is shown that the warped product spacetime P = M×f R and the original spacetime M share necessarily the same causality properties, the only exceptions being the properties of causal continuity and causal simplicity which present some subtleties. In this respect it is shown that the direct product spacetime P = M × R is causally simple if and only if (M, g) is causally simple, has a continuou...
متن کاملMore comments on the high-energy behavior of string scattering amplitudes in warped spacetimes
We study the Regge limit of string amplitudes within the model of Polchinski-Strassler for string scattering in warped spacetimes. We also present some numerical estimations of the Regge slopes and intercepts. It is quite remarkable that the real values of those are inside a range of ours. PACS : 11.25.Pm, 11.25.Db
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ژورنال
عنوان ژورنال: Journal of Mathematical Physics
سال: 2003
ISSN: 0022-2488
DOI: 10.1063/1.1605496