92 citations · 253 across the 4 of their papers we have counts for
4 papers
On the ghost-induced instability on de Sitter background
Patrick Peter, Filipe de O. Salles, Ilya L. Shapiro
It is known that the perturbative instability of tensor excitations in higher derivative gravity may not take place if the initial frequency of the gravitational waves are below th…
Density Perturbations for Running Cosmological Constant
Julio C. Fabris, Ilya L. Shapiro, Joan Sola
The dynamics of density and metric perturbations is investigated for the previously developed model where the decay of the vacuum energy into matter (or vice versa) is due to the r…
On the renormalization group for the interacting massive scalar field theory in curved space
Guilherme de Berredo-Peixoto, Eduard V. Gorbar, Ilya L. Shapiro
The effective action for the interacting massive scalar field in curved space-time is derived using the heat-kernel method. Starting from this effective action, we establish a smoo…
Universality and Ambiguities of the Conformal Anomaly
M. Asorey, E. V. Gorbar, I. L. Shapiro
The one-loop structure of the trace anomaly is investigated using different regularizations and renormalization schemes: dimensional, proper time and Pauli-Villars. The universalit…