299 citations · 352 across the 13 of their papers we have counts for
14 papers
Inflation in unimodular loop quantum cosmology
Steffen Gielen, Rita B. Neves
We study inflation in the setting of unimodular loop quantum cosmology, where time evolution is defined in unimodular time rather than with respect to a free, massless scalar field…
Renormalization effects fade away during inflation
Christian Durán Romero, Luis J. Garay, Mercedes Martín-Benito +1
The renormalization of the primordial inflationary power spectrum has long raised the possibility that ultraviolet effects could significantly alter predictions for cosmological ob…
Asymptotic regularization method. A constructive approach
Christian Durán Romero, Luis J. Garay, Mercedes Martín-Benito +1
We introduce a new regularization scheme for divergent integrals in quantum field theory. The framework is based on the structural decomposition of the integrand asymptotic expansi…
Adiabatic renormalization for modified dispersion relations in cosmology
Christian Durán-Romero, Luis J. Garay, Mercedes Martín-Benito +1
We investigate the behavior of scalar quantum fields in cosmological backgrounds under modified dispersion relations, specifically focusing on how ultraviolet asymptotics influence…
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.…
Low-curvature quantum corrections from unitary evolution of de Sitter space
Steffen Gielen, Rita B. Neves
We study the quantum dynamics of de Sitter space formulated as a minisuperspace model with flat spatial hypersurfaces in unimodular gravity, both in the Wheeler-DeWitt approach and…
Observational imprints from Loop Quantum Cosmology
Rita B. Neves
The standard model of cosmology assumes a homogeneous and isotropic universe that undergoes a period of exponential expansion very early on, named inflation. This stretches quantum…
Adiabatic approach to the trans-Planckian problem in Loop Quantum Cosmology
Luis J. Garay, Mario López González, Mercedes Martín-Benito +1
We study the scalar modes that, being observable today, were trans-Planckian before inflation, within the context of hybrid Loop Quantum Cosmology (LQC). We analyse the dynamics of…
Alleviation of anomalies from the non-oscillatory vacuum in loop quantum cosmology
Mercedes Martín-Benito, Rita B. Neves, Javier Olmedo
In this work we investigate observational signatures of a primordial power spectrum with exponential infrared suppression, motivated by the choice of a non-oscillatory vacuum in a…
States of low energy in the Schwinger effect
Álvaro Álvarez-Domínguez, Luis J. Garay, Mercedes Martín-Benito +1
States of low energy in cosmology minimise the energy density when smeared in a chosen time interval. We extend such construction to generic homogeneous (possibly anisotropic) part…
Non-oscillatory power spectrum from States of Low Energy in kinetically dominated early universes
Mercedes Martín-Benito, Rita B. Neves, Javier Olmedo
Recently, States of Low Energy (SLEs) have been proposed as viable vacuum states of primordial perturbations within Loop Quantum Cosmology (LQC). In this work we investigate the ef…
States of Low Energy in bouncing inflationary scenarios in Loop Quantum Cosmology
Mercedes Martín-Benito, Rita B. Neves, Javier Olmedo
In generic Friedmann-Lemaître-Robertson-Walker spacetimes, States of Low Energy (SLEs) are defined to minimize the regularized energy density smeared along the time-like curve of a…
The Effect of a positive cosmological constant on the bounce of Loop Quantum Cosmology
Mercedes Martín-Benito, Rita B. Neves
We provide an analytical solution to the quantum dynamics of a flat Friedmann-Lemaître- Robertson-Walker model with a massless scalar field in the presence of a small and positive…
Solvable Loop Quantum Cosmology: domain of the volume observable and semiclassical states
Mercedes Martín-Benito, Rita B. Neves
The dynamics of a flat Friedmann-Lemaître-Robertson-Walker model minimally coupled to a massless scalar field has been intensively studied in the context of Loop Quantum Cosmology.…