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Black holes turn white fast, otherwise stay black: no half measures
Carlos Barceló, Raúl Carballo-Rubio, Luis J. Garay
Recently, various authors have proposed that the first ultraviolet effect on the gravitational collapse of massive stars to black holes is the transition between a black-hole geome…
Where does the physics of extreme gravitational collapse reside?
Carlos Barceló, Raúl Carballo-Rubio, Luis J. Garay
The gravitational collapse of massive stars serves to manifest the most severe deviations of general relativity with respect to Newtonian gravity: the formation of horizons and spa…
Timelike information broadcasting in cosmology
Ana Blasco, Luis J. Garay, Mercedes Martin-Benito +1
We study the transmission of information and correlations through quantum fields in cosmological backgrounds. With this aim, we make use of quantum information tools to quantify th…
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…
Quantum frictionless trajectories versus geodesics
Luis C. Barbado, Carlos Barceló, Luis J. Garay
Moving particles outside a star will generally experience quantum friction caused by the Unruh radiation reaction. There exist however radial trajectories that lack this effect (in…
Some not-so-common ideas about gravity
Raúl Carballo-Rubio, Carlos Barceló, Luis J. Garay
Most of the approaches to the construction of a theory of quantum gravity share some principles which do not have specific experimental support up to date. Two of these principles…
The Quantum Echo of the Early Universe
Ana Blasco, Luis J. Garay, Mercedes Martin-Benito +1
We show that the fluctuations of quantum fields as seen by late comoving observers are significantly influenced by the history of the early Universe, and therefore they transmit in…
Unsupervised Feature Learning for Dense Correspondences across Scenes
Chao Zhang, Chunhua Shen, Tingzhi Shen
We propose a fast, accurate matching method for estimating dense pixel correspondences across scenes. It is a challenging problem to estimate dense pixel correspondences between im…