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GR: Fachverband Gravitation und Relativitätstheorie

GR 15: Quantenaspekte der Gravitation und vereinheitlichender Theorien 1

GR 15.5: Talk

Thursday, March 16, 2017, 18:10–18:30, SFG 0140

Planck-scale-modified dispersion relations in homogeneous and isotropic spacetimes — •Christian Pfeifer — ITP Uni Hannover, Hanover Deutschland

Last year I presented how one can understand dispersion relations covariantly as level sets of a Hamilton function on the point particle phase space of spacetime. In this talk I will demonstrate how one obtains the most general homogeneous and isotropic dispersion relation and how this allows us to study a specific Planck-Scale deformation of Friedman-Lemaître-Robertson-Walker (FLRW) geometry. This deformation has the property that it is locally identical to the κ-Poincaré dispersion relation studied extensively in quantum gravity phenomenology. Studying the motion of particles subject to such Hamiltonian we derive the redshift and lateshift as observable consequences of the Planck-scale deformed FLRW universe.

This talk is based on the article: https://arxiv.org/abs/1612.01390