7 papers
Geometric formulation of -essence and late-time acceleration
Lehel Csillag, Erik Jensko
We study a class of geometries in which nonmetricity is fully determined by a vectorial degree of freedom and three independent coefficients. Formulating the simplest linear action…
Interacting dark sector from intrinsic entropy couplings
Erik Jensko, Elsa M. Teixeira, Vivian Poulin
We introduce a new class of interacting dark sector models that couple the intrinsic entropy of dark matter to scalar field dark energy. Using the Lagrangian formulation for relati…
Non-minimal fluid Lagrangian couplings
Christian G. Boehmer, Erik Jensko, Eissa Al-Nasrallah
Gravitational models with non-minimal couplings involving functions of the matter Lagrangian and curvature have become popular in recent decades. By coupling the matter Lagrangian…
Cosmological dynamical systems of non-minimally coupled fluids and scalar fields
Hala A. Ashi, Christian G. Boehmer, Antonio d'Alfonso del Sordo +1
We study the cosmological dynamics of non-minimally coupled matter models using the Brown's variational approach to relativistic fluids in General Relativity. After decomposing the…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
Relativistic interacting fluids in cosmology
Damianos Iosifidis, Erik Jensko, Tomi S. Koivisto
Motivated by cosmological applications for interacting matters, an extension of the action functional for relativistic fluids is proposed to incorporate the physics of non-adiabati…