155 citations · 3.6k across the 84 of their papers we have counts for
87 papers
George, I and the curvaton
Konstantinos Dimopoulos
George Lazarides was a pivotal collaborator and friend to me. We worked together on several projects, developing and exploiting the curvaton hypothesis, which was new at the time.…
Observable Primordial Gravitational Waves from Cosmic Inflation
Konstantinos Dimopoulos
I will review briefly how inflation is expected to generate a stochastic background of primordial gravitational waves (GWs). Then, I will discuss how such GWs can be enhanced by a…
Gauss-Bonnet Dark Energy and the Speed of Gravitational Waves
José Jaime Terente Díaz, Konstantinos Dimopoulos, Mindaugas Karčiauskas +1
Gauss-Bonnet Dark Energy has been a popular model to explain the accelerated expansion of the Universe. Quite generically it also predicts the speed of gravitational waves …
Observable Gravitational Waves from Hyperkination in Palatini Gravity and Beyond
Samuel Sánchez López, Konstantinos Dimopoulos, Alexandros Karam +1
We consider cosmology with an inflaton scalar field with an additional quartic kinetic term. Such a theory can be motivated by Palatini modified gravity. Assuming a runaway…
Explaining the Hubble tension and dark energy from alpha-attractors
Lucy Brissenden, Konstantinos Dimopoulos, Samuel Sánchez López
A compelling unified model of dark energy and early dark energy (EDE) is presented, using a scalar field with an exponential runaway potential, in the context of alpha-attractors.…
Non-oscillating Early Dark Energy and Quintessence from Alpha-Attractors
Lucy Brissenden, Konstantinos Dimopoulos, Samuel Sánchez López
Early dark energy (EDE) is one of the most promising possibilities in order to resolve the Hubble tension: the discrepancy between early and late-Universe measurements of the Hubbl…