The FRLW-FRLW metric combination as an attractor solution in bigravity

@inproceedings{Nersisyan2017TheFM,
  title={The FRLW-FRLW metric combination as an attractor solution in bigravity},
  author={Hayk Nersisyan},
  year={2017}
}
The theory of massive bigravity is an interesting alternative to the standard ΛCDM cosmology. However, despite its phenomenological success at the background level, the theory in its original formulation suffers from different instabilities at the perturbation level. One of the suggestions to cure the theory from these unwilling instabilities was to discuss the possibility of other geometrical forms for both metrics different from previously only studied FRLW-FRLW case. In this work, with the… CONTINUE READING