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9 papers · 2 filters
Weakly Isolated Horizons: First order actions and gauge symmetries
Alejandro Corichi, Juan D. Reyes, Tatjana Vukašinac
Isolated Horizons have played an important role in gravitational physics, from characterization of the endpoint of black hole mergers to black hole entropy. With an eye towards a c…
Uniqueness of the Fock quantization of scalar fields in a Bianchi I cosmology with unitary dynamics
Jerónimo Cortez, Beatriz Elizaga Navascués, Mercedes Martín-Benito +3
The Fock quantization of free scalar fields is subject to an infinite ambiguity when it comes to choosing a set of annihilation and creation operators, choice that is equivalent to…
All-sky search for short gravitational-wave bursts in the first Advanced LIGO run
The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +986
We present the results from an all-sky search for short-duration gravitational waves in the data of the first run of the Advanced LIGO detectors between September 2015 and January…
Hypersurface-deformation algebroids and effective space-time models
Martin Bojowald, Suddhasattwa Brahma, Umut Buyukcam +1
In canonical gravity, covariance is implemented by brackets of hypersurface-deformation generators forming a Lie algebroid. Lie algebroid morphisms therefore allow one to relate di…
Loop expansion and the bosonic representation of loop quantum gravity
Eugenio Bianchi, Jonathan Guglielmon, Lucas Hackl +1
We introduce a new loop expansion that provides a resolution of the identity in the Hilbert space of loop quantum gravity on a fixed graph. We work in the bosonic representation ob…
Callan-Giddings-Harvey-Strominger vacuum in loop quantum gravity and singularity resolution
Alejandro Corichi, Javier Olmedo, Saeed Rastgoo
We study here a complete quantization of a Callan-Giddings-Harvey-Strominger (CGHS) vacuum model following loop quantum gravity techniques. Concretely, we adopt a formulation of th…