Spatial correlators in strongly coupled plasmas
Spatial correlators in strongly coupled plasmas
复制标题
强耦合等离子体中的空间相关器
DOI：
10.1088/1126-6708/2009/11/029
复制
发表时间：
2009
影响因子：
5.4
通讯作者：
H. Meyer
中科院分区：
文献类型：
--
作者：
N. Iqbal;H. Meyer
本文数值计算了SU（3）Yang-Mills理论中标量和赝标算符F_2和F_1在格点上的零温和有限温下的空间算符。我们比较了1/2 T < r < 3/2 T距离上的结果与自由场预测、算符乘积展开以及强耦合大Nc = 4超杨-米尔斯理论的结果，其中结果是通过AdS/CFT方法得到的。当Tc < T < 1.15Tc时，两个通道都表现出比真空中更强的空间相关性，我们用求和规则和算符-乘积展开给出了解释。在温度1.2 < T/Tc < 1.9的区间内，AdS/CFT计算半定量地成功地描述了真空扣除F2相关器，在3圈方案中重整化，而自由场预测有错误的符号。在弱耦合和强耦合的SYM理论中，F和F2算符被预测为具有相同的泛函形式。Yang-Mills等离子体在低于2 Tc时不符合预期。相反，我们发现F的强烈波动至少在该温度下存在。我们讨论了我们的结果对我们的理解夸克胶子等离子体的影响。
We numerically calculate the spatial correlators of the scalar and pseudoscalar operators F2 and F, in SU(3) Yang-Mills theory at zero and finite-temperature on the lattice. We compare the results over the distances 1/2T < r < 3/2T to the free-field prediction, to the operator-product expansion as well as to the strongly coupled large-Nc = 4 super-Yang-Mills theory, where results are obtained by AdS/CFT methods. For Tc < T < 1.15Tc, both channels exhibit stronger spatial correlations than in the vacuum, and we give an explanation for this, using sum-rules and the operator-product expansion. The AdS/CFT calculation provides a semi-quantitatively successful description of the vacuum-subtracted F2 correlator, renormalized in the 3-loop scheme, in the interval of temperatures 1.2 < T/Tc < 1.9, while the free-field prediction has the wrong sign. The F and F2 correlators are predicted to have the same functional form both at weak coupling and in the strongly coupled SYM theory. The Yang-Mills plasma does not meet that expectation below 2Tc. Instead we find that strong fluctuations of F are present at least up to that temperature. We discuss the impact of our results on our understanding of the quark-gluon plasma.
关于静态夸克的晶格作用
DOI：
10.1088/1126-6708/2005/08/051
发表时间：
2005
期刊：
arXiv: High Energy Physics - Lattice
影响因子：
--
作者：
M. Della Morte;A. Shindler;R. Sommer
通讯作者：
R. Sommer