标题： 从大质量引力中得到非线性部分无质量？ 显示英文标题

标题： Nonlinear Partially Massless from Massive Gravity?

摘要： 我们证明，从“f-g”质量引力出发无法获得一致的非线性部分无质量模型，“f”是嵌入的德西特空间。 障碍也是“f-g”非因果性的来源，就是那个移除臭名昭著的第六个鬼态激发的第五个约束。 然而，在这里，它阻碍了质量在宇宙学背景下的规范不变性的扩展，该规范不变性在线性层面上去除了螺旋零模。 此外，我们的方法几乎完成了非因果“f-g”模型的类别。 显示英文摘要

摘要： We show that consistent nonlinear Partially Massless models cannot be obtained starting from "f-g" massive gravity, with "f" the embedding de Sitter space. The obstruction, which is also the source of f-g acausality, is the very same fifth constraint that removes the notorious sixth ghost excitation. Here, however, it blocks extension of the mass to cosmological background tuned gauge invariance that took away the helicity zero mode at linear level. Separately, our methods allow us to almost complete the class of acausal f-g models.