arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1208.0877hep-thgr-qc
收藏

6维共形引力中的单圈发散

One-Loop Divergences in 6D Conformal Gravity

Yi Pang

摘要:

利用精确重整化群方程方法和背景场方法,研究了六维共形引力理论中的单圈问题,该理论的拉格朗日量与多重重合M5-膜的全息Weyl反常具有相同的形式.我们选取对称Einstein空间S6,CP 3,S2 \times S4,S2 \times CP 2,S3 \times S3和S2 \times S2 \times S2作为背景。评价功能和给出幂律和对数发散。我们从上述背景下的对数散度的具体值中提取了欧拉密度前的系数和约束三个B型共形不变量前的系数的两个线性方程。为了验证精确重整化群方程方法在量子共形引力中的有效性,我们重新研究了四维共形引力中的单圈问题,并证实了由广义Schwinger-DeWitt方法导出的对数发散。

英文摘要:

Using Exact Renormalization Group Equation approach and background field method, we investigate the one-loop problem in a six-dimensional conformal gravity theory whose Lagrangian takes the same form as holographic Weyl anomaly of multiple coincident M5-branes. We choose the backgrounds to be the symmetric Einstein spaces including S6, CP3, S2 \times S4, S2 \times CP2, S3 \times S3 and S2 \times S2 \times S2. Evaluating the functional sums gives power-law and logarithmic divergences. We extract from the specific values of logarithmic divergence on above backgrounds, the coefficient in front of Euler density and two linear equations constraining the coefficients in front of three type-B conformal invariants. As a test of the effectiveness of Exact Renormalization Group Equation approach to quantum conformal gravity, we reexaminethe one-loop problem in four-dimensional conformal gravity and confirm the logarithmic divergence derived from generalized Schwinger-DeWitt method.

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。

↑