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arXiv · 1207.2509

Gravity's weight on worldline fuzziness

Giovanni Amelino-Camelia·Valerio Astuti·Giacomo Rosati
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Abstract

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.

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Giovanni Amelino-Camelia, Valerio Astuti, Giacomo Rosati. 2013-01-21. Gravity's weight on worldline fuzziness. https://doi.org/10.1142/s0218271812420126

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