Is quantum Einstein gravity nonperturbatively renormalizable?

被引:185
作者
Lauscher, O [1 ]
Reuter, M [1 ]
机构
[1] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany
关键词
D O I
10.1088/0264-9381/19/3/304
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We find considerable evidence supporting the conjecture that four-dimensional quantum Einstein gravity is 'asymptotically safe' in Weinberg's sense. This would mean that the theory is likely to be nonperturbatively renormalizable and thus could be considered a fundamental (rather than merely effective) theory which is mathematically consistent and predictive down to arbitrarily small length scales. For a truncated version of the exact flow equation of the effective average action, we establish the existence of a non-Gaussian renormalization group fixed point which is suitable for the construction of a nonperturbative infinite cut-off limit. The truncation ansatz includes the Einstein-Hilbert action and a higher derivative term.
引用
收藏
页码:483 / 492
页数:10
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