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The DSR-deformed relativistic symmetries and the relative locality of 3D quantum gravity
Giovanni Amelino-Camelia, Michele Arzano, Stefano Bianco +1
Over the last decade there were significant advances in the understanding of quantum gravity coupled to point particles in 3D (2+1-dimensional) spacetime. Most notably it is emergi…
Gravity's weight on worldline fuzziness
Giovanni Amelino-Camelia, Valerio Astuti, Giacomo Rosati
We investigate a connection between recent results in 3D quantum gravity, providing an effective noncommutative-spacetime description, and some earlier heuristic descriptions of a…
Deformed Lorentz symmetry and relative locality in a curved/expanding spacetime
Giovanni Amelino-Camelia, Antonino MarcianÒ, Marco Matassa +1
The interest of part of the quantum-gravity community in the possibility of Planck-scale-deformed Lorentz symmetry is also fueled by the opportunities for testing the relevant scen…
Phenomenology of Philosophy of Science: OPERA data
Giovanni Amelino-Camelia
I observe that, as the physics side of the OPERA-anomaly story is apparently unfolding, there can still be motivation for philosophy of science to analyze the six months of madness…
Fundamental quantum optics experiments conceivable with satellites -- reaching relativistic distances and velocities
David Rideout, Thomas Jennewein, Giovanni Amelino-Camelia +14
Physical theories are developed to describe phenomena in particular regimes, and generally are valid only within a limited range of scales. For example, general relativity provides…
Relative locality in a quantum spacetime and the pregeometry of -Minkowski
Giovanni Amelino-Camelia, Valerio Astuti, Giacomo Rosati
We develop a new description of the much-studied -Minkowski noncommutative spacetime, centered on representing on a single Hilbert space not only the -Minkowski coordinates,…
Born's prophecy leaves no space for quantum gravity
Giovanni Amelino-Camelia
I stress that spacetime is a redundant abstraction, since describing the physical content of all so-called "space-time measurements" only requires timing (by a physical/material cl…
-Poincaré phase space: speed of massless particles and relativity of spacetime locality
Giacomo Rosati, Niccolo Loret, Giovanni Amelino-Camelia
The study of phase-space constructions based on the properties of the -Poincaré Hopf algebra has been a very active area, mostly because of its possible applications in the phen…
Third road to the OPERA: a tunnel after all?
Giovanni Amelino-Camelia
The debate on OPERA focused on two extremes: either "OPERA is wrong" or our formulation of the laws of physics needs a major overhaul. I here argue that some effort should be direc…