arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1311.2679hep-lat
收藏

改进的格点重整化群技术

Improved Lattice Renormalization Group Techniques

Gregory Petropoulos, Anqi Cheng, Anna Hasenfratz, David Schaich

摘要:

采用非微扰Wilson流优化的Monte Carlo重整化群双格点匹配方法,计算了SU(3)格点规范理论的裸阶跃标度函数$N_f = 12$.在开始RG阻塞步骤之前,我们使用短Wilson流来接近重整化轨迹。通过优化威尔逊流的长度,我们能够确定一个$s_b$对应于一个独特的离散$β$功能,经过几个阻塞步骤。我们进行这项研究,使用新的合奏12味规范配置产生的完全无质量的费米子,使用体积高达$32^4$。结果是一致的存在一个红外固定点(IRFP)的所有调查的晶格体积和阻塞步骤的数量。我们还比较了不同的重整化方案,其中每一个表示一个IRFP在一个略有不同的裸耦合值,预期的IR共形理论。

英文摘要:

We compute the bare step-scaling function $s_b$ for SU(3) lattice gauge theory with $N_f = 12$ massless fundamental fermions, using the non-perturbative Wilson-flow-optimized Monte Carlo Renormalization Group two-lattice matching technique. We use a short Wilson flow to approach the renormalized trajectory before beginning RG blocking steps. By optimizing the length of the Wilson flow, we are able to determine an $s_b$ corresponding to a unique discrete $β$ function, after a few blocking steps. We carry out this study using new ensembles of 12-flavor gauge configurations generated with exactly massless fermions, using volumes up to $32^4$. The results are consistent with the existence of an infrared fixed point (IRFP) for all investigated lattice volumes and number of blocking steps. We also compare different renormalization schemes, each of which indicates an IRFP at a slightly different value of the bare coupling, as expected for an IR-conformal theory.

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。

↑