The dawn of the twenty-first century came with very positive prospects for gravity, cosmology,
and astrophysics. Technological progress made it possible for cosmology to enter to its …

This paper points out the importance of the assumption of locality of physical interactions,
and the concomitant necessity of propagation of an entity (in this case, off-shell quanta …

In this paper we will study Lorentz-invariant, infinite derivative quantum field theories, where
infinite derivatives give rise to non-local interactions at the energy scale M s, beyond the …

We find a plethora of new analytic black holes and globally regular horizonless spacetimes
in three dimensions. The solutions involve a single real scalar field ϕ which always admits a …

We study neutrino oscillations within the framework of extended theories of gravity. Based
on the covariant reformulation of Pontecorvo's formalism, we evaluate the oscillation …

A bstract In this paper we will study R 2-like inflation in a non-local modification of gravity
which contains quadratic in Ricci scalar and Weyl tensor terms with analytic infinite …

In the context of ghost-free, infinite derivative gravity, we provide a quantum mechanical
framework in which we can describe astrophysical objects devoid of curvature singularity …

A bstract We propose a new method to account for quantum-gravitational effects in
cosmological and black hole spacetimes. At the core of our construction is the “decoupling …

In this paper, we present an iterative method to generate an infinite class of new nonlocal
field theories whose propagators are ghost-free. We first examine the scalar field case and …

This paper focuses on extending our previous discussion of an Abelian U (1) gauge theory
involving infinite derivatives to a non-Abelian SU (N) case. The renormalization group …