论文标题
大量重力的谐波仪表的注释
A note on Harmonic Gauge(s) in Massive Gravity
论文作者
论文摘要
我们考虑线性化重力中的谐波量规条件，被视为对称张量场的尺度理论。根据Faddeev-Popov程序，一旦实施了谐波规格条件，习惯后，固定操作仍然取决于一个量规参数。因此，谐波计似乎是一类条件，而不是特定条件。这允许为协变量的谐波量规提供物理动机，当重力扰动的质量术语给出时，它会出现。实际上，对于特定的谐波量规选择，我们发现一种线性化的大量重力理论，表现出五个自由度，并且与标准的Fierz-Pauli理论中发生的情况不同，并且不受VDVZ不连续性的影响。
We consider the harmonic gauge condition in linearized gravity, seen as a gauge theory for a symmetric tensor field. Once the harmonic gauge condition is implemented, as customary, according to the Faddeev-Popov procedure, the gauge fixed action still depends on one gauge parameter. Consequently, the harmonic gauge appears to be a class of conditions, rather than a particular one. This allows to give a physical motivation for the covariant harmonic gauge(s), which emerges when the gravitational perturbation is given a mass term. In fact, for a particular choice of harmonic gauge, we find a theory of linearized massive gravity displaying five degrees of freedom, as it should, and which is not affected by the vDVZ discontinuity, differently from what happens in the standard Fierz-Pauli theory.
