Minkowski space in gravity
arXiv:2004.07536 · doi:10.1103/PhysRevD.103.024054
Abstract
The full set of solutions of gravity with the Minkowski metric is considered in this note. At the 4-th order in perturbations around the trivial tetrad solution, a new mode is found explicitly. Its presence signals a strong coupling problem that transcends the Minkowski background and also suggests the pathological nature of cosmological solutions.
5 pages. v2: metadata corrected, conclusion slightly sharpened