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Quantum gravity

Spacetime fuzziness in focus

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Photons emitted by extragalactic sources provide an opportunity to test quantum gravity effects that modify the speed of light in vacuum. Studying the arrival times of these cosmic messengers further constrains the energy scales involved.

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Figure 1: Principle of the fuzzy time dispersion measurement.

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Authors and Affiliations

  1. Agnieszka Jacholkowska is at the Laboratoire de Physique Nucléaire et de Hautes Energies, IN2P3, CNRS, Universités Paris VI et Paris VII, 4 place Jussieu, F-75252 Paris Cedex 05, France,

    Agnieszka Jacholkowska

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  1. Agnieszka Jacholkowska
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Correspondence to Agnieszka Jacholkowska.

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Jacholkowska, A. Spacetime fuzziness in focus. Nature Phys 11, 302–303 (2015). https://doi.org/10.1038/nphys3293

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