How to (not) break local Lorentz invariance in gravity theory

Abstract: Local Lorentz invariance is one of the crucial features of general relativity which allows relating the reference systems, and hence the clocks, of relatively moving observers. Several gravity theories are claimed to break local Lorentz invariance, including theories involving quantum corrections, modified dispersion relations, Finsler geometry and teleparallel gravity. I explain which of these correspond to an observable violation of local Lorentz invariance and which, despite their name, cannot be observed in nature, even if they are present in the theory.

M. Hohmann, Int. J. Geom. Meth. Mod. Phys. 19, Supp. 1 2240001 (2022) [arXiv:2112.15173 [gr-qc]] M. Hohmann, C. Pfeifer and N. Voicu, J. Math. Phys. 63 032503 (2022) [arXiv:2106.14965 [math-ph] D. Läänemets, M. Hohmann and C. Pfeifer, Int. J. Geom. Meth. Mod. Phys. 19 2250155 (2022) [arXiv:2201.04694 [gr-qc]] M. Hohmann, Class. Quant. Grav. 41 015025 (2024) [arXiv:2310.01487 [gr-qc]]

astrophysicscondensed mattergeneral relativity and quantum cosmologyhigh energy physicsmathematical physicsclassical physicsgeneral physics

Audience: researchers in the topic

Theoretical physics seminar @ Tartu