53 citations · 91 across the 10 of their papers we have counts for
11 papers
Global variables and dynamics of emergent cosmology in loop gravity
Iñaki Garay, Luis J. Garay, Diego H. Gugliotta +2
Deriving emergent cosmology from the discrete geometry of Loop Quantum Gravity remains an open challenge. We solve the two-vertex model exactly, including general non-symmetric con…
Covariant non-perturbative pointer variables for quantum fields
Alejandro Blanco Sánchez, Luis J. Garay, Jose de Ramón
We describe the dynamics of a detector modeled by a harmonic oscillator coupled with an otherwise free quantum field in a curved spacetime in terms of covariant equations of motion…
The two-vertex model of loop quantum gravity: anisotropic reduced sectors
Iñaki Garay, Luis J. Garay, Diego H. Gugliotta
The so-called two-vertex model of loop quantum gravity has been analytically studied in the past within a U() symmetry-reduced sector leading to a cosmological interpretation. I…
Mimicking wormholes in Born-Infeld electrodynamics
Jose Beltrán Jiménez, Luis J. Garay, María Pérez Garrote
We compute the evolution of linear perturbations on top of a background solution of a general nonlinear electromagnetic theory. This evolution can be described in terms of two effe…
No-hair and almost-no-hair results for static axisymmetric black holes and ultracompact objects in astrophysical environments
Carlos Barceló, Raúl Carballo-Rubio, Luis J. Garay +1
No-hair theorems are uniqueness results constraining the form of the metric of black holes in general relativity. These theorems are typically formulated under idealized assumption…
From loop quantum gravity to cosmology: the two-vertex model
Álvaro Cendal, Iñaki Garay, Luis J. Garay
We study the notion of volume and its dynamics in the loop-quantum-gravity truncation known as the two-vertex model. We also show that its U(N)-symmetry reduction provides the old…
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…
Vector dark matter production during inflation and reheating
Jose A. R. Cembranos, Luis J. Garay, Álvaro Parra-López +1
Gravitational particle production of spectator fields due to the expansion universe during the inflationary and reheating phases of the early universe is of particular interest in…
Ultracompact horizonless objects in order-reduced semiclassical gravity
Julio Arrechea, Carlos Barceló, Raúl Carballo-Rubio +1
The backreaction of quantum fields in their vacuum state results in equilibrium structures that surpass the Buchdahl compactness limit. Such backreaction is encapsulated in the vac…
Hawking radiation as perceived by different observers (ERE2011 proceedings)
Luis C. Barbado, Carlos Barceló, Luis J. Garay
We study the perception of Hawking radiation by different observers outside a black hole. The analysis is done in terms of an effective-temperature function that varies along the t…
Hawking radiation as perceived by different observers
Luis C. Barbado, Carlos Barceló, Luis J. Garay
We use a method recently introduced in Barceló et al (2011 Phys. Rev. D 83 41501), to analyse Hawking radiation in a Schwarzschild black hole as perceived by different observers in…