Strongly coupled CFT in FRW universe from AdS/CFT correspondence
Strongly coupled CFT in FRW universe from AdS/CFT correspondence
复制标题
来自 AdS/CFT 对应关系的 FRW 宇宙中的强耦合 CFT
DOI：
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发表时间：
2001
影响因子：
5.4
通讯作者：
J. Soda
中科院分区：
文献类型：
--
作者：
K. Koyama;J. Soda
We develop a formalism to calculate the effective action of the strongly coupled conformal field theory (CFT) in curved spacetime. The effective action of the CFT is obtained from AdS/CFT correspondence. The anti de-Sitter (AdS) spacetime has various slicing which give various curved spacetime on its boundary. We show the de Sitter spacetime and the Friedmann-Robertson-Walker (FRW) universe can be embedded in the AdS spacetime and derive the scalar two-point function of the conformal fields in those spacetime. In curved spacetime, the two-point function depends on the vacuum state of the CFT. A method to specify the vacuum state in AdS/CFT calculations is shown. Because the classical action in AdS spacetime diverges near the boundary, we need the counter terms to regulate the result. The simple derivation of the counter terms using the Hamilton-Jacobi equation is also presented in the appendix.
