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arXiv 1407.4532hep-thgr-qc
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单耦合量子引力的RG分析

RG Analysis for Quantum Gravity with A Single Dimensionless Coupling

Ken-ji Hamada

摘要:

本文研究了量子共形引力,其动力学过程由一个具有负β函数的无量纲引力耦合所控制。由于欧拉项不是经典动力学的,所以它前面的常数不是一个独立的耦合。然而,量子力学,它诱导的Riegert共形因子动力学与BRST共形对称代表背景自由的性质。在本文中,我们提出了如何处理的欧拉项系统地纳入这样的动力学的基础上的重整化群分析,使用维数正则化。作为重正化的一个非平凡检验,我们计算了宇宙学常数算符的三圈反常维数,并表明它与用BRST共形对称性导出的精确表达式一致.讨论了它对暴胀和CMB的物理意义。

英文摘要:

We study the quantum conformal gravity whose dynamics is governed by a single dimensionless gravitational coupling with negative beta function. Since the Euler term is not dynamical classically, the constant in front of it is not an independent coupling. Quantum mechanically, however, it induces the Riegert conformal-factor dynamics with BRST conformal symmetry representing background free nature. In this paper, we propose how to handle the Euler term systematically incorporating such dynamics on the basis of renormalization group analysis using dimensional regularization. As a non-trivial test of renormalization, we explicitly calculate the three-loop anomalous dimension of the cosmological constant operator and show that it agrees with the exact expression derived using the BRST conformal symmetry. The physical significance to inflation and CMB is also discussed.

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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