Graviton loop corrections to vacuum polarization in de Sitter in a general covariant gauge
Graviton loop corrections to vacuum polarization in de Sitter in a general covariant gauge
复制标题
通用协变规范中德西特真空偏振的引力子环校正
DOI：
10.1088/0264-9381/32/19/195014
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发表时间：
2015
影响因子：
3.5
通讯作者：
R. Woodard
中科院分区：
文献类型：
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作者：
D. Glavan;S. Miao;T. Prokopec;R. Woodard
我们评估的一个引力子回路的贡献真空极化的德西特背景下的一个参数的家庭的准确，德西特不变的规范。我们的结果是使用维正则化计算和完全重整化与Bogoliubov，Parasiuk，Hepp和齐默尔曼counterterterms，其中必须包括一个非不变的，由于时间顺序的相互作用。由于引力子传播子产生了de Sitter不变性的物理破缺，因此需要两个结构函数来表示结果。除了与规范问题有关外，这是第一次使用协变规范引力子传播子来计算非重合环。一些身份的推导，这将有助于进一步的引力子循环计算。
We evaluate the one-graviton loop contribution to the vacuum polarization on de Sitter background in a 1-parameter family of exact, de Sitter invariant gauges. Our result is computed using dimensional regularization and fully renormalized with Bogoliubov, Parasiuk, Hepp and Zimmerman counterterms, which must include a noninvariant owing to the time-ordered interactions. Because the graviton propagator engenders a physical breaking of de Sitter invariance two structure functions are needed to express the result. In addition to its relevance for the gauge issue this is the first time a covariant gauge graviton propagator has been used to compute a noncoincident loop. A number of identities are derived which should facilitate further graviton loop computations.
影响因子：
1.3
作者：
E. Kahya;S. Miao;R. Woodard
通讯作者：
E. Kahya;S. Miao;R. Woodard