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220 papers · 1 filter
A connection between Gravitational Scalar-Tensor theories and Generalized Hybrid theories
Jonathan Ramírez, Santiago Esteban Perez Bergliaffa
We establish a correspondence between higher-derivative gravitational scalar-tensor theories of the form and generalized hybrid metric-Palatini models $f…
Polymerized spacetime dynamics with multifield source: Unraveling the pre-inflationary Universe
Divya Gupta, Manabendra Sharma, Gustavo S. Vicente +2
We study a multifield model in loop quantum cosmology for a maximally symmetric spacetime governed by the Einstein-Hilbert action minimally coupled to scalar fields. Using a Legend…
Choice of Quantum Vacuum for Inflation Observables
Melo Wood-Saanaoui, Rudnei O. Ramos, Arjun Berera
We investigate the modifications to inflationary observables that arise when adopting an -vacuum instead of the standard Bunch--Davies vacuum for quantum fluctuations during inf…
Estimation of the MTOV precision for ET, CE, and NEMO from the post-merger of BNS coalescences
Gabriela Conde-Saavedra, Odylio Denys Aguiar, Henrique P. de Oliveira +1
The detection of the gravitational waves produced after the coalescence of two neutron stars is greatly anticipated because it will be able to provide information about matter in e…
Thermodynamical and dynamical stability of Einstein-Maxwell and extremal Einstein-Born-Infeld thin shells in dimensions
Dario Olmos Cayo, Zui Oporto Almaraz, M. L. Peñafiel
We study the dynamical and thermodynamical stability of thin shells in (2+1)-dimensional spacetimes composed of an inner anti-de Sitter (AdS) region and an outer region described b…
Constraining a de Broglie--Bohm quantum bounce cosmology with Planck data
Micol Benetti, Rudnei O. Ramos, Renato Silva +1
This work investigates a singularity-free early Universe within the paradigm of quantum cosmology. We develop a bouncing model where the singularity is resolved via the de Broglie-…