Bigravity and Lorentz-violating Massive Gravity

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

25 pages. v3 Typos corrected, references added. v4 Introduction extended

Scientific paper

10.1103/PhysRevD.76.104036

Bigravity is a natural arena where a non-linear theory of massive gravity can be formulated. If the interaction between the metrics $f$ and $g$ is non-derivative, spherically symmetric exact solutions can be found. At large distances from the origin, these are generically Lorentz-breaking bi-flat solutions (provided that the corresponding vacuum energies are adjusted appropriately). The spectrum of linearized perturbations around such backgrounds contains a massless as well as a massive graviton, with {\em two} physical polarizations each. There are no propagating vectors or scalars, and the theory is ghost free (as happens with certain massive gravities with explicit breaking of Lorentz invariance). At the linearized level, corrections to GR are proportional to the square of the graviton mass, and so there is no vDVZ discontinuity. Surprisingly, the solution of linear theory for a static spherically symmetric source does {\em not} agree with the linearization of any of the known exact solutions. The latter coincide with the standard Schwarzschild-(A)dS solutions of General Relativity, with no corrections at all. Another interesting class of solutions is obtained where $f$ and $g$ are proportional to each other. The case of bi-de Sitter solutions is analyzed in some detail.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Bigravity and Lorentz-violating Massive Gravity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Bigravity and Lorentz-violating Massive Gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bigravity and Lorentz-violating Massive Gravity will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-366100

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.