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arXiv 1402.0871hep-thmath-phmath.MP
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N=4 SYM中从小自旋到强耦合的量子谱曲线

Quantum Spectral Curve at Work: From Small Spin to Strong Coupling in N=4 SYM

Nikolay Gromov, Fedor Levkovich-Maslyuk, Grigory Sizov, Saulius Valatka

摘要:

本文将最近提出的量子谱曲线技术应用于研究平面N=4 SYM理论中的扭转算符。我们着重研究sl(2)扇区中反常维的小自旋展开,并精确计算了任意t Hooft耦合值下的前两阶自旋展开。在自旋S的首阶,我们再现了Basso的斜率函数。下一个S^2阶项在结构上类似于Beisert-Eden-Staudacher敷料相,并考虑了包裹作用。这种扩展包含了丰富的信息,在强耦合的本地运营商的频谱。特别是,我们发现了一个新的系数在强耦合扩展的小西算子尺寸和确认几个以前已知的条款。我们还得到了BFKL波密子截距的几个新的强耦合级数。作为一个副产品,我们制定了一个处方,正确的分析延续S打开了一条路,从AdS/CFT可积性推导扭曲两个异常尺寸的BFKL制度。

英文摘要:

We apply the recently proposed quantum spectral curve technique to the study of twist operators in planar N=4 SYM theory. We focus on the small spin expansion of anomalous dimensions in the sl(2) sector and compute its first two orders exactly for any value of the 't Hooft coupling. At leading order in the spin S we reproduced Basso's slope function. The next term of order S^2 structurally resembles the Beisert-Eden-Staudacher dressing phase and takes into account wrapping contributions. This expansion contains rich information about the spectrum of local operators at strong coupling. In particular, we found a new coefficient in the strong coupling expansion of the Konishi operator dimension and confirmed several previously known terms. We also obtained several new orders of the strong coupling expansion of the BFKL pomeron intercept. As a by-product we formulated a prescription for the correct analytical continuation in S which opens a way for deriving the BFKL regime of twist two anomalous dimensions from AdS/CFT integrability.

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