Decaying Dark Energy models modify the background evolution of the most common
observables, such as the Hubble function, the luminosity distance and the Cosmic …

Fields of spin s≥ 1/2 satisfying wave equations in a curved space obey the Huygens
principle under certain conditions clarified by a known theorem. Here, this theorem is …

We compare the standard Higgs mechanism corresponding to the scalar field, with the
dynamical origin of the graviton mass inside the scenario of the dRGT theory of massive …

We derive the vacuum energy from the zero-point quantum fluctuations after imposing a
natural constraint emerging from the rotational symmetry inside the de-Sitter metric. The …

In this paper, we discuss the behavior of coordinate-time dependent lapse function of FLRW
metric of an accelerated expanding universe in the de Rham–Gabadadze–Tolley massive …