45 citations · 78 across the 5 of their papers we have counts for
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hep-th2013★ 45 cited
Galileon bounce after ekpyrotic contraction
M. Osipov, V. Rubakov
We consider a simple cosmological model that includes a long ekpyrotic contraction stage and smooth bounce after it. Ekpyrotic behavior is due to a scalar field with a negative exp…
hep-th2010★ 29 cited
Scalar tilt from broken conformal invariance
V. Rubakov, M. Osipov
Within recently proposed scenario which explains flatness of the spectrum of scalar cosmological perturbations by a combination of conformal and global symmetries, we discuss the e…
hep-th2008★ 4 cited
Superluminality in the Fierz--Pauli massive gravity
M. Osipov, V. Rubakov
We study the propagation of helicity-1 gravitons in the Fierz--Pauli massive gravity in nearly Minkowski backgrounds. We show that, generically, there exist backgrounds consistent…