604 citations · 4.7k across the 66 of their papers we have counts for
4 papers · 1 filter
Cosmological constraints on deviations from Lorentz invariance in gravity and dark matter
B. Audren, D. Blas, M. M. Ivanov +2
We consider a scenario where local Lorentz invariance is violated by the existence of a preferred time direction at every space-time point. This scenario can arise in the context o…
Completing Lorentz violating massive gravity at high energies
Diego Blas, Sergey Sibiryakov
Theories with massive gravitons are interesting for a variety of physical applications, ranging from cosmological phenomena to holographic modeling of condensed matter systems. To…
From scale invariance to Lorentz symmetry
Sergey Sibiryakov
It is shown that a unitary translationally invariant field theory in (1+1) dimensions satisfying isotropic scale invariance, standard assumptions about the spectrum of states and o…
UV-extending Ghost Inflation
Mikhail M. Ivanov, Sergey Sibiryakov
We present a setup that provides a partial UV-completion of the ghost inflation model up to a scale which can be almost as high as the Planck mass. This is achieved by coupling the…