articlePhysical Review LettersJan 19, 2012GREEN OA

Towards Singularity- and Ghost-Free Theories of Gravity

TBTirthabir BiswasEGErik GerwickTKTomi KoivistoAMAnupam Mazumdar

Loyola University New Orleans · University of Göttingen · +3 more institutions

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Indexed inarxivcrossrefpubmed

Abstract

We present the most general covariant ghost-free gravitational action in a Minkowski vacuum. Apart from the much studied f(R) models, this includes a large class of nonlocal actions with improved UV behavior, which nevertheless recover Einstein's general relativity in the IR.

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Topics & keywords

Topics
Keywords
  • Singularity
  • Physics
  • Theoretical physics
  • Classical mechanics
  • Gravitation
  • Mathematical physics
  • Mathematics
  • Geometry
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