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GR: Fachverband Gravitation und Relativitätstheorie

GR 18: Poster

GR 18.2: Poster

Donnerstag, 14. März 2024, 17:15–18:45, HBR 14: Foyer

Lorentz-invariant quantum gravity by elimination of spacetime — •René Friedrich — Strasbourg

Spacetime is more and more often suspected of being at the origin of the problem of quantum gravity. However, it will be shown that general relativity may not only be described within a spacetime manifold, but also in Lorentz-invariant terms. In particular, gravity may not only be represented in the form of curved spacetime, but also equivalently as gravitational time dilation in flat, uncurved space.

Quantum mechanics and general relativity are harmonizing because - fundamentally speaking - they are both Lorentz-invariant. Lorentz-covariant spacetime is only the way how the universe of general relativity is perceived and measured by observers, it is a sort of "observational interface", half-way between the observer and the underlying reality. The Lorentz-invariant universe of quantum gravity is not observable, it must be retrieved from observation by calculation, exactly in the same way as the proper time of a particle is retrieved from the coordinate time measured by an observer. Further information: R. Friedrich: Quantengravitation ohne Mühe

Keywords: Quantum gravity; Spacetime; Lorentz-invariance