Anisotropic Friedmann-Robertson-Walker universe from nonlinear massive gravity

Jun, 2012
4 pages
Published in:
  • Phys.Lett.B 717 (2012) 295-298
  • Published: Oct 31, 2012
e-Print:
Report number:
  • IPMU12-0123

Citations per year

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Abstract: (Elsevier)
Motivated by the recent no-go result of homogeneous and isotropic solutions in the nonlinear massive gravity, we study fixed points of evolution equations for a Bianchi type-I universe. We find a new attractor solution with non-vanishing anisotropy, on which the physical metric is isotropic but the Stückelberg configuration is anisotropic. As a result, at the background level, the solution describes a homogeneous and isotropic universe, while a statistical anisotropy is expected from perturbations, suppressed by smallness of the graviton mass.
Note:
  • 4 pages, 1 figure, REVTeX4/ V2 with minor revison, and to appear on PLB
  • space-time: Robertson-Walker
  • anisotropy: statistical
  • gravitation: massive
  • gravitation: nonlinear
  • evolution equation
  • fixed point
  • attractor
  • space-time: Bianchi
  • cosmological model: anisotropy
  • Friedman model