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arXiv 1002.4843hep-th
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强耦合下Bethe Anglesia中的尖峰弦

Spiky strings in Bethe Ansatz at strong coupling

M. Kruczenski, A. Tirziu

摘要:

我们研究了AdS 3 x S1中的尖峰弦解,其特征在于两个自旋S,J以及S1中的缠绕m和尖峰数n。利用SL(2)型渐近Bethe Anchor方程在强耦合下的首阶解,构造了显式的两截解。与折叠旋转弦不同,这些解具有不对称的贝特根分布。对于任意的半经典参数,包括J=0和S的任意值,即短弦和长弦,这些解与直接从弦论得到的已知尖峰弦经典结果相匹配。当自旋和缠绕数较大时,弦会碰到边界,我们发现一个新的标度极限,其能量为E-S = n /2/ pi sqrt[1+ 4 pi^2/n^2(J^2/ln^2 S + m^2/ln^2 S)] ln S。这是已知的用于折叠的纺纱绳的缩放的一般化。

英文摘要:

We study spiky string solutions in AdS3 x S1 that are characterized by two spins S,J as well as winding m in S1 and spike number n. We construct explicitly two-cut solutions by using the SL(2) asymptotic Bethe Ansatz equations at leading order in strong coupling. Unlike the folded spinning string, these solutions have asymmetric distributions of Bethe roots. The solutions match the known spiky string classical results obtained directly from string theory for arbitrary semiclassical parameters, including J=0 and any value of S, namely short and long strings. At large spins and winding number the string touches the boundary, and we find a new scaling limit with the energy given as E-S = n /2/ pi sqrt[1+ 4 pi^2/n^2 (J^2/ln^2 S + m^2/ln^2 S)] ln S. This is a generalization of the known scaling for the folded spinning string.

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