Ambient cosmology and spacetime singularities

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• 作者：Ignatios Antoniadis (1) (2)
  Spiros Cotsakis (3) (4)
  
  1. Albert Einstein Center for Fundamental Physics ; Institute for Theoretical Physics ; Bern University ; Sidlerstrasse 5 ; 3012 ; Bern ; Switzerland
  2. Ecole Polytechnique ; 91128 ; Palaiseau ; France
  3. Department of Physics ; CERN ; Theory Division ; 1211 ; Geneva 23 ; Switzerland
  4. School of Applied Mathematics and Physical Sciences ; National Technical University ; 15780 ; Athens ; Greece
  
• 刊名：The European Physical Journal C - Particles and Fields
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：75
• 期：1
• 全文大小：294 KB
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• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Elementary Particles and Quantum Field Theory
  Nuclear Physics, Heavy Ions and Hadrons
  Physics beyond the Standard Model
  Measurement Science and Instrumentation
  Astronomy, Astrophysics and Cosmology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1434-6052

文摘

We present a new approach to the issues of spacetime singularities and cosmic censorship in general relativity. This is based on the idea that standard 4-dimensional spacetime is the conformal infinity of an ambient metric for the 5-dimensional Einstein equations with fluid sources. We then find that the existence of spacetime singularities in four dimensions is constrained by asymptotic properties of the ambient 5-metric, while the non-degeneracy of the latter crucially depends on cosmic censorship holding on the boundary.