arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.15668hep-th
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曲线空间中算子乘积展开的递归构造

Recursive construction of the operator product expansion in curved space

Markus B Fröb

摘要:

作为量子作用量原理的自然推广,导出了任意弯曲空间中算子乘积展开系数(Wilson OPE系数)的耦合常数导数公式。将系数本身展开为耦合常数的幂,该公式允许将它们递归地计算到任意阶。作为输入,只需要自由理论中的OPE系数,这是很容易得到的使用威克定理。我说明的方法,通过计算的OPE的两个标量$ϕ$在双曲空间(欧几里德反德西特空间)的条款消失的速度比他们的分离的平方,以一阶的四次相互作用$g ϕ^4$,以及OPE系数$\mathcal{C}^{\mathbb{1}}_{ϕϕ}$在二阶$g$。

英文摘要:

I derive a formula for the coupling-constant derivative of the coefficients of the operator product expansion (Wilson OPE coefficients) in an arbitrary curved space, as the natural extension of the quantum action principle. Expanding the coefficients themselves in powers of the coupling constants, this formula allows to compute them recursively to arbitrary order. As input, only the OPE coefficients in the free theory are needed, which are easily obtained using Wick's theorem. I illustrate the method by computing the OPE of two scalars $ϕ$ in hyperbolic space (Euclidean Anti-de Sitter space) up to terms vanishing faster than the square of their separation to first order in the quartic interaction $g ϕ^4$, as well as the OPE coefficient $\mathcal{C}^{\mathbb{1}}_{ϕϕ}$ at second order in $g$.

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