1.4k citations · 4.8k across the 88 of their papers we have counts for
12 papers · 1 filter
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…
Operational realization of quantum vacuum ambiguities
Álvaro Álvarez-Domínguez, José A. R. Cembranos, Luis J. Garay +3
We provide a reinterpretation of the quantum vacuum ambiguities that one encounters when studying particle creation phenomena due to an external and time-dependent agent. We propos…
Embedding Unimodular Gravity in String Theory
Luis J. Garay, Gerardo García-Moreno
Unimodular Gravity is a theory displaying Weyl rescalings of the metric and transverse (volume-preserving) diffeomorphisms as gauge symmetries, as opposed to the full set of diffeo…
Generalized quantum Vlasov equation for particle creation and unitary dynamics
Álvaro Álvarez-Domínguez, Luis J. Garay, Mercedes Martín-Benito
The loss of time-translational invariance caused by a time-dependent external agent leads to particle creation effects in quantum field theory. This phenomenon results in ambiguiti…
Quantum unitary dynamics of a charged fermionic field and Schwinger effect
Álvaro Álvarez-Domínguez, Luis J. Garay, David García-Heredia +1
In quantum field theory, particle creation occurs, in general, when an intense external field, such as an electromagnetic field, breaks time translational invariance. This leads to…
Emergent gauge symmetries: Yang-Mills theory
Carlos Barceló, Raúl Carballo-Rubio, Luis J. Garay +1
Gauge symmetries remove unphysical states and guarantee that field theories are free from the pathologies associated with these states. In this work we find a set of general condit…
Unitary quantization of a charged scalar field and Schwinger effect
Luis J. Garay, Alberto García Martín-Caro, Mercedes Martín-Benito
Quantum field theory in curved spacetimes suffers in general from an infinite ambiguity in the choice of Fock representation and associated vacuum. In cosmological backgrounds, the…
Scale Holography
Jose A. R. Cembranos, Salvador E. R. Ciarreta, Luis J. Garay
We present a new correspondence between a d-dimensional dynamical system and a whole family of (d+1)-dimensional systems. This new scale-holographic relation is built by the explic…
Uncovering the effective spacetime: Lessons from the effective field theory rationale
Carlos Barceló, Raúl Carballo-Rubio, Luis J. Garay
The cosmological constant problem can be understood as the failure of the decoupling principle behind effective field theory, so that some quantities in the low-energy theory are e…
Circular strings, wormholes and minimum size
Luis J. Garay, Pedro F. Gonzalez-Diaz, Guillermo A. Mena Marugan +1
The quantization of circular strings in an anti-de Sitter background spacetime is performed, obtaining a discrete spectrum for the string mass. A comparison with a four-dimensional…
The dynamical structure of higher dimensional Chern-Simons theory
Maximo Banados, Luis J. Garay, Marc Henneaux
Higher dimensional Chern-Simons theories, even though constructed along the same topological pattern as in 2+1 dimensions, have been shown recently to have generically a non-vanish…
The local degrees of freedom of higher dimensional pure Chern-Simons theories
Maximo Banados, Luis J. Garay, Marc Henneaux
The canonical structure of higher dimensional pure Chern-Simons theories is analysed. It is shown that these theories have generically a non-vanishing number of local degrees of fr…