121 citations · 423 across the 19 of their papers we have counts for
7 papers · 1 filter
Extending general covariance: Moyal-type noncommutative manifolds
Martin Bojowald, Suddhasattwa Brahma, Umut Buyukcam +1
In the Hamiltonian formulation of general relativity, Einstein's equation is replaced by a set of four constraints. Classically, the constraints can be identified with the generato…
Observable traces of non-metricity: new constraints on metric-affine gravity
A. Delhom I Latorre, Gonzalo J. Olmo, Michele Ronco
Relaxing the Riemannian condition to incorporate geometric quantities such as torsion and non-metricity may allow to explore new physics associated with defects in a hypothetical s…
Quantum coordinate operators: why space-time lattice is fuzzy
Suddhasattwa Brahma, Antonino Marcianò, Michele Ronco
Working within the framework of Loop Quantum Gravity (LQG), we construct a set of three operators suitable for identifying coordinate-like quantities on a spin-network configuratio…
In-vacuo-dispersion-like spectral lags in gamma-ray bursts
Giovanni Amelino-Camelia, Giacomo D'Amico, Fabrizio Fiore +2
Some recent studies exposed rather strong statistical evidence of in-vacuo-dispersion-like spectral lags for gamma-ray bursts (GRBs), a linear correlation between time of observati…
Dimensional flow and fuzziness in quantum gravity: emergence of stochastic spacetime
Gianluca Calcagni, Michele Ronco
We show that the uncertainty in distance and time measurements found by the heuristic combination of quantum mechanics and general relativity is reproduced in a purely classical an…
Imprint of quantum gravity in the dimension and fabric of spacetime
Giovanni Amelino-Camelia, Gianluca Calcagni, Michele Ronco
We here conjecture that two much-studied aspects of quantum gravity, dimensional flow and spacetime fuzziness, might be deeply connected. We illustrate the mechanism, providing fir…