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Autor Garay Elizondo, Luis Javier |
Documentos disponibles escritos por este autor (46)
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Observational indications combined with analyses of analogue and emergent gravity in condensed matter systems support the possibility that there might be two distinct energy scales related to quantum gravity: the scale that sets the onset of qua[...]texto impreso
The quantum state of a wormhole can be represented by a path integral over all asymptotically Euclidean four-geometries and all matter fields which have prescribed values, the arguments of the wave function, on a three-surface S which divides th[...]texto impreso
Galan, Pablo ; Garay Elizondo, Luis Javier ; Mena Marugán, Guillermo A. | Amer Physical Soc | 2007-08The combined action of gravity and quantum mechanics gives rise to a minimum time uncertainty in the lowest order approximation of a perturbative scheme, in which quantum effects are regarded as corrections to the classical spacetime geometry. F[...]texto impreso
We perform a quasinormal mode analysis of black-hole configurations in Bose-Einstein condensates (BECs). In this analysis we use the full Bogoliubov dispersion relation, not just the hydrodynamic or geometric approximation. We restrict our atten[...]texto impreso
Real clocks are not perfect. This must have an effect in our predictions for the behavior of a quantum system, an effect for which we present a unified description, encompassing several previous proposals. We study the relevance of clock errors [...]texto impreso
We analyze the Hawking radiation process due to collapsing configurations in the presence of superluminal modifications of the dispersion relation. With such superluminal dispersion relations, the horizon effectively becomes a frequency-dependen[...]texto impreso
Ruiz Cembranos, José Alberto ; Villarrubia Rojo, Héctor ; Llanes Estrada, Felipe José ; Garay Elizondo, Luis Javier ; López Maroto, Antonio ; Fernández Sanz, David | 2018-06-19Esta memoria contiene los principales resultados del proyecto de innovación docente número 34 de la convocatoria 2017/2018 que lleva por título "Software libre como herramienta de aprendizaje en mecánica".texto impreso
Garay Elizondo, Luis Javier ; Anglin, J. R. ; Cirac, J. I. ; Zoller, P. | American Physical Society | 2000-11-27It is shown that, in dilute-gas Bose-Einstein condensates, there exist both dynamically stable and unstable configurations which, in the hydrodynamic limit, exhibit a behavior resembling that of gravitational black holes. The dynamical instabili[...]texto impreso
Garay Elizondo, Luis Javier ; Cirac, J. I. ; Anglin, J. R. ; Zoller, P. | American Physical Society | 2001-02The sonic analog of a gravitational black hole in dilute-gas Bose-Einstein condensates is investigated. It is shown that there exist both dynamically stable and unstable configurations which, in the hydrodynamic limit, exhibit behaviors complete[...]texto impreso
An effective model for the spacetime foam is constructed in terms of nonlocal interactions in a classical background. In the weak coupling approximation, the evolution of the low-energy density matrix is determined by a master equation that pred[...]texto impreso
We examine the linear stability of various configurations in Bose-Einstein condensates with steplike sonic horizons. These configurations are chosen in analogy with gravitational systems with a black hole horizon, a white hole horizon, and a com[...]texto impreso
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-vanishing number of degrees of freedom. In this paper, we carry out t[...]texto impreso
Martin Martinez, Eduardo ; Garay Elizondo, Luis Javier ; León, Juan | IOP publishing ltd | 2012-11-21We analyse the evolution of the entanglement of a non-trivial initial quantum field state (which, for simplicity, has been taken to be a bipartite state made out of vacuum and the first excited state) when it undergoes a gravitational collapse. [...]texto impreso
Barbado, L. C. ; Barceló, C. ; Garay Elizondo, Luis Javier ; Jannes, Gil | Int School Advanced Studies | 2011-11We use the avoidance of the trans-Planckian problem of Hawking radiation as a guiding principle in searching for a compelling scenario for the evaporation of black holes or black-hole-like objects. We argue that there exist only three possible s[...]texto impreso
Spacetime foam can be modeled in terms of nonlocal effective interactions in a classical nonfluctuating background. Then, the density matrix for the low-energy fields evolves, in the weak-coupling approximation, according to a master equation th[...]texto impreso
The generalized Wick transform discovered by Thiemann provides a well established relation between the Euclidean and Lorentzian theories of general relativity. We extend this Thiemann transform to the Ashtekar formulation for gravity coupled wit[...]texto impreso
Fluctuations around a Bose-Einstein condensate can be described by means of Bogolubov theory leading to the notion of quasiparticle and antiquasiparticle familiar to nonrelativistic condensed-matter practitioners. On the other hand, we already k[...]texto impreso
Barceló, Carlos ; Carballo-Rubio, Raúl ; Garay Elizondo, Luis Javier | American Physical Society | 2012-04-02We explicitly compare the structure of the renormalized stress-energy tensor of a massless scalar field in a (1 + 1) curved spacetime as obtained by two different strategies: normal-mode construction of the field operator and one-loop effective [...]texto impreso
Barceló, Carlos ; Carballo Rubio, Raúl ; Garay Elizondo, Luis Javier | American Physical Society | 2014-06-16It is commonly accepted that general relativity is the only solution to the consistency problem that appears when trying to build a theory of interacting gravitons (massless spin-2 particles). Padmanabhan’s 2008 thought-provoking analysis raised[...]texto impreso
Martin Martinez, Eduardo ; Garay Elizondo, Luis Javier ; León, Juan | Amer Physical Soc | 2010-09-03We analyze the entanglement degradation provoked by the Hawking effect in a bipartite system Alice-Rob when Rob is in the proximities of a Schwarzschild black hole while Alice is free falling into it. We will obtain the limit in which the tools [...]texto impreso
The effects of asymptotically anti-de Sitter wormholes in low-energy field theory are calculated in full detail for three different matter contents: a conformal scalar field, an electromagnetic field and gravitons. There exists a close relation [...]