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arXiv 1405.4585hep-thgr-qchep-lat
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CDT中的重整化群流

Renormalization Group Flow in CDT

J. Ambjorn, A. Goerlich, J. Jurkiewicz, A. Kreienbuehl, R. Loll

摘要:

本文首次研究了四维量子引力的非微扰晶格模型的耦合常数流,给出了因果动力学三角剖分(CDT)。在解释了格点场论的标准概念如何适用于这种背景无关理论的情况后,我们根据动态生成的量子宇宙的某些半经典性质,在耦合常数空间中定义了“常数物理线”的概念。通过蒙特卡罗模拟确定流线,我们发现,如果考虑空间和时间的各向异性尺度,该理论中存在的二阶相变线可以解释为紫外相变线。

英文摘要:

We perform a first investigation of the coupling constant flow of the nonperturbative lattice model of four-dimensional quantum gravity given in terms of Causal Dynamical Triangulations (CDT). After explaining how standard concepts of lattice field theory can be adapted to the case of this background-independent theory, we define a notion of "lines of constant physics" in coupling constant space in terms of certain semiclassical properties of the dynamically generated quantum universe. Determining flow lines with the help of Monte Carlo simulations, we find that the second-order phase transition line present in this theory can be interpreted as a UV phase transition line if we allow for an anisotropic scaling of space and time.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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