Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Dapor, Andrea"'
Autor:
Dapor, Andrea, Liegener, Klaus
Publikováno v:
EPJC 80, no. 741 (2020)
It is expected that the quantum nature of spacetime leaves its imprint in all semiclassical gravitational systems, at least in certain regimes, including gravitational waves. In this paper we investigate such imprints on gravitational waves within a
Externí odkaz:
http://arxiv.org/abs/2002.00834
Publikováno v:
Phys. Rev. D 100, 106016 (2019)
We reexamine a set of existing procedures aimed at recovering the effective description of the dynamics of LQG in the context of cosmological solutions. In particular, the studies of those methods, to which the choice of cuboidal graphs and graph-pre
Externí odkaz:
http://arxiv.org/abs/1910.04710
Perspectives on the dynamics in a loop quantum gravity effective description of black hole interiors
Publikováno v:
Phys. Rev. D 101, 026002 (2020)
In the loop quantum gravity context, there have been numerous proposals to quantize the reduced phase space of a black hole, and develop a classical effective description for its interior which eventually resolves the singularity. However, little pro
Externí odkaz:
http://arxiv.org/abs/1908.05756
Publikováno v:
Phys. Rev. D 100, 084003 (2019)
We present a detailed analysis of a quantum model for Loop Quantum Cosmology based on strict application of the Thiemann regularization algorithm for the Hamiltonian in Loop Quantum Gravity, extending the results presented previously in our brief rep
Externí odkaz:
http://arxiv.org/abs/1906.05315
Publikováno v:
Phys. Rev. Lett. 121, 081303 (2018)
The quantum nature of the Big Bang is reexamined in the framework of Loop Quantum Cosmology. The strict application of a regularization procedure to the Hamiltonian, originally developed for the Hamiltonian in loop quantum gravity, leads to a qualita
Externí odkaz:
http://arxiv.org/abs/1801.00768
Autor:
Dapor, Andrea, Liegener, Klaus
Publikováno v:
Class. Quant. Grav. 35 (2018) no. 13, 135011
This is the first paper of a series dedicated to LQG coherent states and cosmology. The concept is based on the effective dynamics program of Loop Quantum Cosmology, where the classical dynamics generated by the expectation value of the Hamiltonian o
Externí odkaz:
http://arxiv.org/abs/1710.04015
Autor:
Dapor, Andrea, Liegener, Klaus
Publikováno v:
Phys.Lett.B 785 (2018)
The concept of effective dynamics has proven successful in LQC, a loop-inspired quantization of cosmological spacetimes. We apply the same idea of its derivation in LQC to the full theory, by computing the expectation value of the scalar constraint w
Externí odkaz:
http://arxiv.org/abs/1706.09833
Autor:
Assanioussi, Mehdi, Dapor, Andrea
Publikováno v:
Phys. Rev. D 95, 063513 (2017)
In this paper we present a construction of effective cosmological models which describe the propagation of a massive quantum scalar field on a quantum anisotropic cosmological spacetime. Each obtained effective model is represented by a rainbow metri
Externí odkaz:
http://arxiv.org/abs/1606.09186
Publikováno v:
Phys. Rev. D 92, 104023 (2015)
We present a new method for constructing operators in loop quantum gravity. The construction is an application of the general idea of "coherent state quantization", which allows one to associate a unique quantum operator to every function on a classi
Externí odkaz:
http://arxiv.org/abs/1507.01153
Publikováno v:
Phys. Rev. D 91, 124002 (2015)
We present the affine coherent state quantization of the Bianchi I model. As in our previous paper on quantum theory of Friedmann models, we employ a variable associated with a perfect fluid to play a role of clock. Then we deparameterize the model.
Externí odkaz:
http://arxiv.org/abs/1501.07718