Deducing Cosmological Observables from the S-matrix
Deducing Cosmological Observables from the S-matrix
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从 S 矩阵推导宇宙学可观测量
DOI：
10.1103/physrevd.96.104029
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发表时间：
2017
影响因子：
5
通讯作者：
R. Woodard
中科院分区：
文献类型：
--
作者：
S. Miao;T. Prokopec;R. Woodard
我们研究了无质量标量在两个质量标量之间交换所引起的长程力的单圈量子引力修正。在一般协变规范下对构成平坦空间S矩阵的各种图示进行了评价，结果表明，在形成完整的S矩阵之前，对规范参数的依赖在相当大的程度上消除了，这在宇宙学中是不能观察到的。可以将我们的计算解释为有效场方程式的解-即使在宇宙学中也可以这样做-但考虑到来自源和观测者的量子引力修正。
We study one loop quantum gravitational corrections to the long range force induced by the exchange of a massless scalar between two massive scalars. The various diagrams contributing to the flat space S-matrix are evaluated in a general covariant gauge and we show that dependence on the gauge parameters cancels at a point considerably {\it before} forming the full S-matrix, which is unobservable in cosmology. It is possible to interpret our computation as a solution to the effective field equations --- which could be done even in cosmology --- but taking account of quantum gravitational corrections from the source and from the observer.