Fixed-Functionals of three-dimensional Quantum Einstein Gravity

Fixed-Functionals of three-dimensional Quantum Einstein Gravity
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三维量子爱因斯坦引力的固定泛函

DOI:
10.1007/jhep11(2012)131
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发表时间:
2012
影响因子:
5.4
通讯作者:
O. Zanusso
O. Zanusso
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
M. Demmel;F. Saueressig;O. Zanusso

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研究了三维渐近安全量子爱因斯坦引力中f(R)-引力的非微扰重整化群流。在共形约化近似下,我们导出了一个精确的偏微分方程,控制函数f(R)的RG尺度依赖性。该方程具有两个孤立的和一个连续的单参数家庭的规模无关,正规的解决方案,构成自然推广RG不动点的境界的无限维理论空间。所有的解决方案是有界的,从下面,并产生正定的动力学条款。此外,他们承认一个或两个UV相关的变形,这表明相应的UV临界超曲面保持有限维,尽管包含了无穷多个耦合常数。我们的研究结果的引力渐近安全计划的影响和它的连接到新的大质量引力简要讨论。
We study the non-perturbative renormalization group flow of f (R)-gravity in three-dimensional Asymptotically Safe Quantum Einstein Gravity. Within the conformally reduced approximation, we derive an exact partial differential equation governing the RG-scale dependence of the function f (R). This equation is shown to possess two isolated and one continuous one-parameter family of scale-independent, regular solutions which constitute the natural generalization of RG fixed points to the realm of infinite-dimensional theory spaces. All solutions are bounded from below and give rise to positive definite kinetic terms. Moreover, they admit either one or two UV-relevant deformations, indicating that the corresponding UV-critical hypersurfaces remain finite dimensional despite the inclusion of an infinite number of coupling constants. The impact of our findings on the gravitational Asymptotic Safety program and its connection to new massive gravity is briefly discussed.
重新审视共形约简量子引力
DOI: --
发表时间: 2009
期刊:
影响因子: --
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