5 papers
Quasinormal modes in effective loop quantum gravity and consequences for isospectrality
Alejandro García-Quismondo, Guillermo A. Mena Marugán, Alvaro Torres-Caballeros
We investigate the quasinormal mode spectra of axial and polar perturbations about the effective Ashtekar, Olmedo, and Singh black hole geometry within the hybrid approach to loop…
Effective Regge-Wheeler equations of a hybrid loop quantum black hole
Beatriz Elizaga Navascués, Alvaro Torres-Caballeros
A set of effective equations for the gauge-invariant gravitational perturbations in the interior of a spherically symmetric, non-rotating black hole is derived within the framework…
Expansion-sensitive coupling of a local quantum system in de Sitter cosmology
Jorma Louko, Guillermo A. Mena Marugán, Alvaro Torres-Caballeros
When a local quantum system couples to a quantum field in a cosmological spacetime, the time dependence of the coupling strength is conventionally taken to reflect the design of th…
Time-dependent scalings and Fock quantization of a massless scalar field in Kantowski-Sachs
Jerónimo Cortez, Guillermo A. Mena Marugán, Alvaro Torres-Caballeros +1
We address the issue of inequivalent Fock representations in Quantum Field Theory in a curved homogenous and anisotropic background, namely Kantowski-Sachs spacetime. A family of u…
Fock quantization of a Klein-Gordon field in the interior geometry of a nonrotating black hole
Jerónimo Cortez, Beatriz Elizaga Navascués, Guillermo A. Mena Marugán +2
We study the canonical quantization of a scalar field in a Kantowski-Sachs spacetime. For simplicity, we consider compactified spatial sections, since this does not affect the ultr…