Deriving the Gibbons-Maldacena-Nunez no-go theorem from the Raychaudhuri equation

Feb 13, 2024
7 pages
Published in:
  • Phys.Rev.D 109 (2024) 6, 6
  • Published: Mar 15, 2024
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Abstract: (APS)
In this article, we point out that to solve the null Raychaudhuri equation for higher-dimensional spacetime with an accelerating FRW solution in external directions and static compact internal directions, it is necessary to violate the strong-energy condition in higher dimensions. This constraint is well-known in obtaining accelerating cosmological solutions in string compactification, first described by Gibbons-Maldacena-Nunez. In deriving this constraint, we do not make any assumptions regarding the matter content.
  • strong-energy condition: violation
  • string: compactification
  • space-time: higher-dimensional
  • Raychaudhuri equation
  • Robertson-Walker
  • expansion: acceleration
  • cosmological model