Quantum field theory in the flat chart of de Sitter space
Quantum field theory in the flat chart of de Sitter space
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德西特空间平面图中的量子场论
DOI：
10.1103/physrevd.87.024013
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Takahiro Tanaka
中科院分区：
文献类型：
--
作者：
Yusuke Korai;Takahiro Tanaka
研究了摄动下各阶德西特空间平面图中相互作用量子场论的相关子。相关系数的计算采用内-内的形式，这种形式通常应用于宇宙学摄动的计算。结果表明，这些相关器是德西特不变量。并与基于欧几里得场论计算的相关系数进行了比较。然后我们发现这两个相关器是相同的。这种对应关系已经被逐图证明了，但是我们用直接计算给出了另一种证明。
We study the correlators for interacting quantum field theory in the flat chart of de Sitter space at all orders in perturbation. The correlators are calculated in the in-in formalism which is often applied to the calculations in the cosmological perturbation. It is shown that these correlators are de Sitter invariant. They are compared with the correlators calculated based on the Euclidean field theory. We then find that these two correlators are identical. This correspondence has already been shown graph by graph, but we give an alternative proof of it by direct calculation.