2020/04/26 by Jose Beltran Jimenez, Alexey Golovnev, Tomi Koivisto +1 · 1 citation
Physics and Astronomy · #gr-qc
paper · pdf · doi:10.1103/physrevd.103.024054
published as Phys. Rev. D 103, 024054 (2021) · 5 pages. v2: metadata corrected, conclusion slightly sharpened
arxiv created 2020/04/26 · arxiv updated 2021/02/03
The full set of solutions of f(T) 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.