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arXiv 0904.3665hep-th
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$\mathcal{N}=4$ SYM理论中强耦合Wilson环和t 'Hooft环的关联函数

Correlator of Wilson and t'Hooft Loops at Strong Coupling in $\mathcal{N}=4$ SYM Theory

A. Gorsky, A. Monin, A. V. Zayakin

摘要:

本文在N=4 SYM理论中,计算了强耦合时a 't Hooft和Wilson共面同心圆的关联函数,并将其归结为在适当的边界条件下计算弯曲空间中的复合极小曲面。在零温时,发现这种构型的t Hooft环和威尔逊圈的最小容许半径比为$\mathrm{e}^{-1/2}\approx 0.606$,并导出了最小容许半径比与温度的关系。在低温下,t Hooft和威尔逊圈的最小容许比保持接近0.6,而在高温下$T$变为等于$\frac{1}{πT}$。我们发现,在任何温度下都存在一个相变点:在某一特定的“t Hooft环半径”之下,Wilson-“t Hooft关联函数的对偶对应物在AdS中被组织成两个不连通的表面,而在该半径之上,则存在一个由电荷面、介子面和双子面组成的连通组态.本文对荷电边界的纠缠熵作了推广,并对强耦合下的计算作了一些评论。

英文摘要:

We calculate the correlator of a 't Hooft and a Wilson coplanar circular concentric loops at strong coupling in N=4 SYM theory when it reduces to the calculation of the composite minimal surface in the curved space with the proper boundary conditions. The minimal admissible ratio of the radii of 't Hooft and Wilson loops for such a configuration is found to be $\mathrm{e}^{-1/2}\approx 0.606$ at zero temperature and the dependence of the minimal admissible radii ratio on temperature is derived. At low temperatures the minimal admissible ratio for 't Hooft and Wilson loops remains close to 0.6, whereas at high temperatures $T$ it becomes equal to $\frac{1}{πT}$. We find that at any temperature there exists a phase transition point: beneath some specific value of 't Hooft loop radius the dual counterpart of Wilson-'t Hooft correlator is organized as two disconnected surfaces in AdS, whereas for 't Hooft loop radius above it, there exists a connected configuration with a junction of monopole, charge and dyon surfaces. We suggest a generalization of the entanglement entropy for charged boundaries and make some comments on its calculation at strong coupling.

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。

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