Published January 1, 2018 | Version v1
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Exotic massive 3D gravity

  • 1. Department of Physics, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey
  • 2. Mathematical Institute, University of Oxford, Woodstock Road, Oxford, OX2 6GG, U.K.
  • 3. Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge, CB3 0WA, U.K.

Description

The linearized equations of "New Massive Gravity" propagate a parity doublet of massive spin-2 modes in 3D Minkowski spacetime, but a different non-linear extension is made possible by "third-way" consistency. There is a "Chern-Simons-like" action, as for other 3D massive gravity models, but the new theory is "exotic": its action is parity odd. This "Exotic Massive Gravity" is the next-to-simplest case in an infinite sequence of third-way consistent 3D gravity theories, the simplest being the "Minimal Massive Gravity" alternative to "Topologically Massive Gravity".

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