Thursday, July 12, 2012

1207.2509 (Giovanni Amelino-Camelia et al.)

Gravity's weight on worldline fuzziness    [PDF]

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 quantum-gravity contribution to the fuzziness of the worldlines of particles. We show that 3D-gravity-inspired spacetime noncommutativity reflects some of the features suggested by previous heuristic arguments. Most notably, gravity-induced worldline fuzziness, while irrelevantly small on terrestrial scales, could be observably large for propagation of particles over cosmological distances.
View original: http://arxiv.org/abs/1207.2509

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