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arXiv · 1708.02429

Planck-scale dual-curvature lensing and spacetime noncommutativity

Giovanni Amelino-Camelia·Leonardo Barcaroli·Stefano Bianco·Laura Pensato
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Abstract

It was recently realized that Planck-scale momentum-space curvature, which is expected in some approaches to the quantum-gravity problem, can produce dual-curvature lensing, a feature which mainly affects the direction of observation of particles emitted by very distant sources. Several gray areas remain in our understanding of dual-curvature lensing, including the possibility that it might be just a coordinate artifact and the possibility that it might be in some sense a by product of the better studied dual-curvature redshift. We stress that data reported by the IceCube neutrino telescope should motivate a more vigorous effort of investigation of dual-curvature lensing, and we observe that studies of the recently proposed "$\rho$-Minkowski noncommutative spacetime" could be valuable from this perspective. Through a dedicated $\rho$-Minkowski analysis, we show that dual-curvature lensing is not merely a coordinate artifact and that it can be present even in theories without dual-curvature redshift.

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Giovanni Amelino-Camelia, Leonardo Barcaroli, Stefano Bianco, Laura Pensato. 2017-08-08. Planck-scale dual-curvature lensing and spacetime noncommutativity. https://arxiv.org/abs/1708.02429

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