arXiv 1201.01292012-01hep-th

非对易Yang-Mills理论中规范/引力对偶的威尔逊圈

Wilson loops in noncommutative Yang-Mills theory using gauge/gravity duality

Somdeb Chakraborty, Najmul Haque, Shibaji Roy

备注：: Latex file, 24 pages, 12 figures, v2, 28 pages, more clarifications and references added, to appear in Nuclear Physics B
发表信息：: Nucl.Phys. B862 (2012) 650-670
DOI：: 10.1016/j.nuclphysb.2012.05.003

摘要：

利用规范/引力对偶和Maldacena公式计算了（3+1）维非对易Yang-Mills（NCYM）理论中威尔逊圈的期望值.我们考虑类时和类光的威尔逊圈。引力对偶背景由IIB型弦论（D1，D3）束缚态的特定退耦极限给出。我们得到了速度相关的夸克-反夸克势，并数值研究了偶极长度和势随速度的变化（0 < v < 1，即，威尔逊圈是类时的）以及非对易性。我们讨论了所得结果，并与已知的交换结果进行了比较。当快度大，非对易性参数小，乘积小时，我们也得到了屏蔽长度的解析表达式。当v \rightarrow为1时，类时威尔逊圈变为类光环，得到了强耦合非对易杨-米尔斯等离子体的喷注猝灭参数的形式，与我们以前用不同方法得到的结果相一致.

英文摘要：

By using the gauge/gravity duality and the Maldacena prescription we compute the expectation values of the Wilson loops in noncommutative Yang-Mills (NCYM) theory in (3+1) dimensions. We consider both the time-like and the light-like Wilson loops. The gravity dual background is given by a particular decoupling limit of (D1,D3) bound state of type IIB string theory. We obtain the velocity dependent quark-antiquark potential and numerically study how the dipole length and the potential change with velocity (for 0 < v < 1, i.e., the Wilson loop is time-like) of the dipole as well as noncommutativity. We discuss and compare the results with the known commutative results. We also obtain an analytic expression for the screening length when the rapidity is large and the noncommutativity parameter is small with the product remaining small. When v \rightarrow 1, the time-like Wilson loop becomes light-like and in that case we obtain the form of the jet quenching parameter for the strongly coupled noncommutative Yang-Mills plasma which matches with our earlier results obtained using different method.

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