标题： Λ在渐近安全框架下的重求和量子引力中的估计 显示英文标题

标题： An Estimate of Λin Resummed Quantum Gravity in the Context of Asymptotic Safety

摘要： 我们表明，通过使用最近发展的精确重求和技术，这些技术基于将Yennie、Frautschi和Suura的方法扩展到Feynman对爱因斯坦理论的表述，我们得到了关于Weinberg所提出的无量纲引力和宇宙学常数的紫外固定点行为的量子场论描述。 将我们的工作与Bonanno和Reuter对普朗克尺度宇宙学的相关现象学渐近安全性分析联系起来，我们预测了宇宙学常数的值 \Lambda 。 我们找到令人鼓舞的估计 \rho _\Lambda \equiv \frac{\Lambda}{8\pi G_N} \simeq (2.379\times 10^{-3}eV)^4. 显示英文摘要

摘要： We show that, by using recently developed exact resummation techniques based on the extension of the methods of Yennie, Frautschi and Suura to Feynman's formulation of Einstein's theory, we get quantum field theoretic descriptions for the UV fixed-point behaviors of the dimensionless gravitational and cosmological constants postulated by Weinberg. Connecting our work to the attendant phenomenological asymptotic safety analysis of Planck scale cosmology by Bonanno and Reuter, we predict the value of the cosmological constant \Lambda. We find the encouraging estimate \rho_\Lambda\equiv \frac{\Lambda}{8\pi G_N} \simeq (2.379\times 10^{-3}eV)^4.