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Showing 2014 · gr-qcShow all
3 papers · 2 filters
gr-qc2014★ 40 cited
On the nonlinear instability of confined geometries
Hirotada Okawa, Vitor Cardoso, Paolo Pani
The discovery of a "weakly-turbulent" instability of anti-de Sitter spacetime supports the idea that confined fluctuations eventually collapse to black holes and suggests that simi…
gr-qc2014★ 42 cited
Dark matter in ghost-free bigravity theory: From a galaxy scale to the universe
Katsuki Aoki, Kei-ichi Maeda
We study the origin of dark matter based on the ghost-free bigravity theory with twin matter fluids. The present cosmic acceleration can be explained by the existence of graviton m…
gr-qc2014★ 25 cited
Cosmology in ghost-free bigravity theory with twin matter fluids: The origin of "dark matter"
Katsuki Aoki, Kei-ichi Maeda
We study dynamics of Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime based on the ghost-free bigravity theory. Assuming the coupling parameters guaranteeing the existence of d…