890 citations · 5.2k across the 55 of their papers we have counts for
56 papers
Covariant Horava-like and mimetic Horndeski gravity: cosmological solutions and perturbations
Guido Cognola, Ratbay Myrzakulov, Lorenzo Sebastiani +2
We consider a variant of the Nojiri-Odintsov covariant Horava-like gravitational model, where diffeomorphism invariance is broken dynamically via a non-standard coupling to a perfe…
Scale-invariant rotating black holes in quadratic gravity
Guido Cognola, Massimiliano Rinaldi, Luciano Vanzo
Black hole solutions in pure quadratic theories of gravity are interesting since they allow to formulate a set of scale-invariant thermodynamics laws. Recently, we have proven that…
Thermodynamics of topological black holes in gravity
Guido Cognola, Massimiliano Rinaldi, Luciano Vanzo +1
We study topological black hole solutions of the simplest quadratic gravity action and we find that two classes are allowed. The first is asymptotically flat and mimics the Reissne…
Inflation in scale-invariant theories of gravity
Massimiliano Rinaldi, Guido Cognola, Luciano Vanzo +1
Thanks to the Planck Collaboration, we know the value of the scalar spectral index of primordial fluctuations with unprecedented precision. In addition, the joint analysis of the d…
Functional Determinant of the Massive Laplace Operator and the Multiplicative Anomaly
G. Cognola, E. Elizalde, S. Zerbini
After a brief survey of zeta function regularization issues and of the related multiplicative anomaly, illustrated with a couple of basic examples, namely the harmonic oscillator a…
Reconstructing the inflationary from observations
Massimiliano Rinaldi, Guido Cognola, Luciano Vanzo +1
The BICEP2 collaboration has recently released data showing that the scalar-to-tensor ratio is much larger than expected. The immediate consequence, in the context of gr…