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arXiv 1306.2527hep-th
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尖点Wilson直线的代数曲线

Algebraic Curve for a Cusped Wilson Line

Grigory Sizov, Saulius Valatka

摘要:

本文讨论了在平面N=4 SYM中插入L个R荷单位的算子的尖点Wilson线的反常维数的经典极限。经典极限要求将t Hooft耦合和L都取到无穷大。由于尖点反常维数的公式涉及与L成比例的尺寸的行列式,经典极限要求结果的矩阵模型重新表述。我们构造了这种矩阵模型式表示,并找到了相应的经典代数曲线.利用这一结果,我们导出了尖点反常维数的经典值和对它的1-圈修正,并用经典解的能量和从有限L的量子区外推的数值方法检验了我们的结果。

英文摘要:

We consider the classical limit of the recently obtained exact result for the anomalous dimension of a cusped Wilson line with the insertion of an operator with L units of R-charge at the cusp in planar N=4 SYM. The classical limit requires taking both the 't Hooft coupling and L to infinity. Since the formula for the cusp anomalous dimension involves determinants of size proportional to L, the classical limit requires a matrix model reformulation of the result. We construct such matrix model-like representation and find corresponding classical algebraic curve. Using this we derive the classical value of the cusp anomalous dimension and the 1-loop correction to it. We check our results against the energy of the classical solution and numerically by extrapolating from the quantum regime of finite L.

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