推导引力场传播子的一种对称性方法

Derivation of Graviton Propagator by a Symmetric Method

利用在拉氏量中引力场的二次型内核以及引力场传播子的对称性,构造出一些基本的对称性模块,它们构成了满足该组对称性的完备空间。推导求得了这些模块两两之间的乘积关系,并由此简便地推导得到了有质量的Kaluza-Klein引力场与零质量的引力场的传播子。

According to the symmetry of the kernal of the quadratic term in the graviton Lagrangian and the symmetry of the graviton propagator,a complete basis set of building blocks satisfying this symmetry and obtain their product relations is constructed.Using these building blocks,the propagator expressions of the massive Kaluza-Klein graviton and the massless graviton is easily derived,respectively.