论文标题
在对称触发性重力中用于静态球形场配置的重合量表
Coincident gauge for static spherical field configurations in symmetric teleparallel gravity
论文作者
论文摘要
在对称的远程关爱中,独立连接的特征在于非赞誉,而曲率和扭转为零,可以找到一个坐标系,从而使连接在全球范围内消失,而协变量衍生物则减少到部分衍生物为一致的量表。在本文中,我们将常规转换规则推导到时空配置的一致仪表中,其中度量和连接都是静态和球面对称的,并写出相应的量规指标的各自形式。 Taking different options in fixing the freedom in the connection allowed by the symmetry and the field equations, the Schwarzschild metric in the coincident gauge can take for instance the Cartesian, Kerr-Schild, and diagonal (isotropic-like) forms, while the BBMB black hole metric in symmetric teleparallel scalar-tensor theory a certain diagonal form fits the coincident gauge requirements but the Cartesian and Kerr-Schild表格没有。不同的连接意味着边界项的不同价值原则上可能在物理上是相关的,但是关于一致规格的简单论点似乎不足以独特地固定连接。作为调查的副产品,我们还指出,只有特定的静态球形对称连接的特定子集在Minkowski极限中的非赞誉消失。
In symmetric teleparallel gravities, where the independent connection is characterized by nonmetricity while curvature and torsion are zero, it is possible to find a coordinate system whereby the connection vanishes globally and covariant derivatives reduce to partial derivatives -- the coincident gauge. In this paper we derive general transformation rules into the coincident gauge for spacetime configurations where the both the metric and connection are static and spherically symmetric, and write out the respective form of the coincident gauge metrics. Taking different options in fixing the freedom in the connection allowed by the symmetry and the field equations, the Schwarzschild metric in the coincident gauge can take for instance the Cartesian, Kerr-Schild, and diagonal (isotropic-like) forms, while the BBMB black hole metric in symmetric teleparallel scalar-tensor theory a certain diagonal form fits the coincident gauge requirements but the Cartesian and Kerr-Schild forms do not. Different connections imply different value for the boundary term which could in principle be physically relevant, but simple arguments about the coincident gauge do not seem to be sufficient to fix the connection uniquely. As a byproduct of the investigation we also point out that only a particular subset of static spherically symmetric connections has vanishing nonmetricity in the Minkowski limit.