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 …

Asymptotically Safe theories of gravity have recently received much attention. In this work we
discuss a class of inflationary models derived from quantum-gravity modification of quadratic …

We consider an inflationary model motivated by quantum effects of gravitational and matter
fields near the Planck scale. Our Lagrangian is a resummed version of the effective …

In this paper, we use corrected f (R) gravitational model which is a polynomial function with a
logarithmic term. We employ the slow-roll conditions and obtain the number of cosmological …

We use the non-Gaussian fixed points (NGFPs) appearing in the renormalization group flow
of gravity and gravity–matter systems to construct models of NGFP-driven inflation via a …

We consider R p inflation with p≈ 2, allowing small deviation from R 2 inflation. Using the
inflaton potential in the Einstein frame, we construct a consistency relation between the …

We explore inflationary cosmology in a theory where there are two scalar fields which non-
minimally couple to the Ricci scalar and an additional R^ 2 R 2 term, which breaks the …

The BICEP2 collaboration has recently released data showing that the scalar-to-tensor ratio
r is much larger than expected. The immediate consequence, in the context of f (R) gravity, is …

We construct the covariant effective field theory of gravity as an expansion in inverse powers
of the Planck mass, identifying the leading and next-to-leading quantum corrections. We …

We explore the quantum nature of black holes by introducing an effective framework that
takes into account deviations from the classical results. The approach is based on …