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of 285
pro vyhledávání: '"Jorge Pullin"'
Autor:
Rodolfo Gambini, Jorge Pullin
Publikováno v:
Universe, Vol 10, Iss 2, p 77 (2024)
We continue our work on the study of spherically symmetric loop quantum gravity coupled to two spherically symmetric scalar fields, with one that acts as a clock. As a consequence of the presence of the latter, we can define a true Hamiltonian for th
Externí odkaz:
https://doaj.org/article/3c8c72ce0f9a4adc9c6cde0ffd085d85
Publikováno v:
Universe, Vol 8, Iss 10, p 526 (2022)
We propose a new polymerization scheme for scalar fields coupled to gravity. It has the advantage of being a (non-bijective) canonical transformation of the fields, and therefore ensures the covariance of the theory. We study it in detail in spherica
Externí odkaz:
https://doaj.org/article/c7d3c83ad9ab44deb272ff361a7bd15f
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 8 (2021)
We continue our investigation of an improved quantization scheme for spherically symmetric loop quantum gravity. We find that in the region where the black hole singularity appears in the classical theory, the quantum theory contains semi-classical s
Externí odkaz:
https://doaj.org/article/77d9455ce8a747b1b6d54923d4e48d95
Autor:
Rodolfo Gambini, Jorge Pullin
Publikováno v:
New Journal of Physics, Vol 24, Iss 5, p 053011 (2022)
We introduced with coauthors some years ago a solution to the problem of time in quantum gravity which consists in formulating the quantum theory in terms of real clocks. It combines Page and Wootters’ relational proposal with Rovelli’s evolving
Externí odkaz:
https://doaj.org/article/3d22bc3365ab4fa6b665b567018f9151
Autor:
Rodolfo Gambini, Jorge Pullin
Publikováno v:
Universe, Vol 6, Iss 12, p 236 (2020)
We review the Montevideo Interpretation of quantum mechanics, which is based on the use of real clocks to describe physics, using the framework that was recently introduced by Höhn, Smith, and Lock to treat the problem of time in generally covariant
Externí odkaz:
https://doaj.org/article/6b764b878d9b40679acdc02a6637d56b
Autor:
Rodolfo Gambini, Jorge Pullin
Publikováno v:
Entropy, Vol 20, Iss 6, p 413 (2018)
The Montevideo interpretation of quantum mechanics, which consists of supplementing environmental decoherence with fundamental limitations in measurement stemming from gravity, has been described in several publications. However, some of them appeare
Externí odkaz:
https://doaj.org/article/7a06500bdcd047aab28e81cbb9289c96
Autor:
Rodolfo Gambini, Jorge Pullin
Publikováno v:
Physics Letters B, Vol 749, Iss C, Pp 374-375 (2015)
In loop quantum gravity the discrete nature of quantum geometry acts as a natural regulator for matter theories. Studies of quantum field theory in quantum space–times in spherical symmetry in the canonical approach have shown that the main effect
Externí odkaz:
https://doaj.org/article/e046086a3c4e46c5a26d7aa41e3836cc
Autor:
Jorge Pullin
Publikováno v:
Momento, Vol 0, Iss 17, Pp 63-68 (1998)
La mayoría de los físicos notamos una gran analogía entre el campo gravitatorio y el campo electromagnético. Cuando en los cursos introductorios se cubre la electrostática, la analogía con el caso gravitatorio es total. Dicha analogía también
Externí odkaz:
https://doaj.org/article/28b81d4afa394d1b9308c602f56b383d
Publikováno v:
Symmetry, Integrability and Geometry: Methods and Applications, Vol 8, p 002 (2012)
In this review we discuss the interplay between discretization, constraint implementation, and diffeomorphism symmetry in Loop Quantum Gravity and Spin Foam models. To this end we review the Consistent Discretizations approach, which is an applicatio
Externí odkaz:
https://doaj.org/article/72b87374230a47649d1342ec6f834742
Autor:
Rodolfo Gambini, Jorge Pullin
This book provides an accessible introduction to loop quantum gravity and some of its applications, at a level suitable for undergraduate students and others with only a minimal knowledge of college level physics. In particular it is not assumed that
