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arXiv 1410.4657gr-qchep-th
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dS/LCFT对应的宇宙学三耦合标量理论

Cosmological three-coupled scalar theory for the dS/LCFT correspondence

Yun Soo Myung, Taeyoon Moon

摘要:

本文研究了三耦合标量理论中de Sitter暴胀过程中产生的宇宙学扰动。该理论由三个耦合标量($ϕ_p,p=1,2,3$)组成,除了张量之外,还给出了$ϕ_3$的六阶导数标量理论。从动量空间的LCFT变换子恢复标量间的功率谱表明,de Sitter/对数共形场论(dS/LCFT)对应在超视界极限下是有效的.我们使用由dS/LCFT微分字典导出的LCFT分解子来比较宇宙学分解子(功率谱),并利用外推字典找到LCFT分解子。这是因为前者比后者更传统。在LCFT中找到酉CFT的截断过程的体版本对偶对应于选择在dS时空上具有正范数传播的物理场$ϕ_2$。

英文摘要:

We investigate cosmological perturbations generated during de Sitter inflation in the three-coupled scalar theory. This theory is composed of three coupled scalars ($ϕ_p,p=1,2,3$) to give a sixth-order derivative scalar theory for $ϕ_3$, in addition to tensor. Recovering the power spectra between scalars from the LCFT correlators in momentum space indicates that the de Sitter/logarithmic conformal field theory (dS/LCFT) correspondence works in the superhorizon limit. We use LCFT correlators derived from the dS/LCFT differentiate dictionary to compare cosmological correlators (power spectra) and find also LCFT correlators by making use of extrapolate dictionary. This is because the former approach is more conventional than the latter. A bulk version dual to the truncation process to find a unitary CFT in the LCFT corresponds to selecting a physical field $ϕ_2$ with positive norm propagating on the dS spacetime.

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