Zobrazeno 1 - 10
of 251
pro vyhledávání: '"Gubitosi, Giulia"'
Publikováno v:
J. Phys.: Conf. Ser. 2667 (2023) 012033
The aim of this contribution is twofold. First, we show that when two (or more) different quantum groups share the same noncommutative spacetime, such an 'ambiguity' can be resolved by considering together their corresponding noncommutative spaces of
Externí odkaz:
http://arxiv.org/abs/2310.14123
Autor:
de Cesare, Marco, Gubitosi, Giulia
We study the dynamics of the homogeneous and isotropic cosmological background in the recently proposed ``quantum phenomenological gravitational dynamics'', characterised by logarithmic corrections to the Bekenstein entropy. We show that the model ad
Externí odkaz:
http://arxiv.org/abs/2307.10966
Autor:
Amelino-Camelia, Giovanni, Frattulillo, Domenico, Gubitosi, Giulia, Rosati, Giacomo, Bedić, Suzana
Studies of in-vacuo dispersion are the most active area of quantum-gravity phenomenology. The way in which in-vacuo dispersion produces redshift-dependent corrections to the time of flight of astrophysics particles depends on the model-dependent inte
Externí odkaz:
http://arxiv.org/abs/2307.05428
Autor:
D'Esposito, Vittorio, Gubitosi, Giulia
We investigate the implications of decoherence induced by quantum spacetime properties on neutrino oscillation phenomena. We develop a general formalism where the evolution of neutrinos is governed by a Lindblad-type equation and we compute the oscil
Externí odkaz:
http://arxiv.org/abs/2306.14778
We discuss the quantum Poincar\'e symmetries of the $\varrho$-Minkowski spacetime, a space characterised by an angular form of noncommutativity. We show that it is possible to give them both a bicrossproduct and a Drinfel'd twist structure. We also o
Externí odkaz:
http://arxiv.org/abs/2305.00526
Autor:
Caloni, Luca, Giardiello, Serena, Lembo, Margherita, Gerbino, Martina, Gubitosi, Giulia, Lattanzi, Massimiliano, Pagano, Luca
Publikováno v:
JCAP03(2023)018
We perform a comprehensive study of the signatures of Lorentz violation in electrodynamics on the Cosmic Microwave Background (CMB) anisotropies. In the framework of the minimal Standard Model Extension (SME), we consider effects generated by renorma
Externí odkaz:
http://arxiv.org/abs/2212.04867
Publikováno v:
Phys. Lett. B 838 (2023) 137735
The noncommutative spacetimes associated to the $\kappa$-Poincar\'e relativistic symmetries and their "non-relativistic" (Galilei) and "ultra-relativistic" (Carroll) limits are indistinguishable, since their coordinates satisfy the same algebra. In t
Externí odkaz:
http://arxiv.org/abs/2212.01125
We review the main features of models where relativistic symmetries are deformed at the Planck scale. We cover the motivations and links to other quantum gravity approaches. We describe in some detail the most studied theoretical frameworks, includin
Externí odkaz:
http://arxiv.org/abs/2211.11684
Autor:
Amelino-Camelia, Giovanni, Di Luca, Maria Grazia, Gubitosi, Giulia, Rosati, Giacomo, D'Amico, Giacomo
Publikováno v:
Nat Astron (2023)
In addition to its implications for astrophysics, the hunt for GRB neutrinos could also be significant in quantum-gravity research, since they are excellent probes of the microscopic fabric of spacetime. Some previous studies based on IceCube neutrin
Externí odkaz:
http://arxiv.org/abs/2209.13726
We show that quantum properties of spacetime, encoded by noncommutativity at the Planck scale, lead to a generalized time evolution of quantum systems in which pure states can evolve into mixed states. Specifically, a decoherence mechanism is obtaine
Externí odkaz:
http://arxiv.org/abs/2208.14119