标题： 修正重力中的非平凡闵可夫斯基背景 显示英文标题

标题： Non-trivial Minkowski backgrounds in f(T) gravity

摘要： 在$f(T)$引力中研究了提升和旋转四联体背景的闵可夫斯基空间。 我们首先在一阶近似下对非平凡背景进行洛伦兹摄动，并表明一些洛伦兹模态可以表现出非平凡的动力学并且可以在时间中传播。 这一显著特征表明洛伦兹部分存在额外的模态，在洛伦兹破缺修正引力中没有先例，然而它们也可能对这些模型的理论可行性提出质疑。 显示英文摘要

摘要： Boosted and rotated tetrad backgrounds for the Minkowski space are studied in $f(T)$ gravity. We perform Lorentzian perturbations at first order around non-trivial backgrounds and show that some Lorentz modes can exhibit non-trivial dynamics and can propagate in time. This remarkable feature gives evidence of additional mode(s) in the Lorentzian sector which have no precedent in Lorentz-violating modified gravities, however they can cast doubts onto even theoretical viability of these models.