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PPN expansion and FRW scalar perturbations in n-DBI gravity
Flávio S. Coelho, Carlos Herdeiro, Shinji Hirano +1
n-DBI gravity explicitly breaks Lorentz invariance by the introduction of a unit time-like vector field, thereby giving rise to an extra (scalar) degree of freedom. We look for obs…
n-DBI Gravity in a nutshell
Flavio S. Coelho, Carlos Herdeiro, Shinji Hirano +1
We present a new model of gravity which explicitly breaks Lorentz-invariance by the introduction of a unit time-like vector field, thereby giving rise to an extra (scalar) degree o…
n-DBI gravity
Carlos Herdeiro, Shinji Hirano, Yuki Sato
n-DBI gravity is a gravitational theory introduced in arXiv:1109.1468 [hep-th], motivated by Dirac-Born-Infeld type conformal scalar theory and designed to yield non-eternal inflat…