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arXiv hep-th/0209047hep-th
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AdS_5 × S_5上的循环半经典弦解

Circular Semiclassical String Solutions on AdS_5 x S_5

Joseph A. Minahan

摘要:

本文讨论AdS_5上的两个半经典弦解。在第一种情况下,我们考虑一个多缠绕的圆弦在AdS_5的径向方向上脉动,但固定到S_5上的一点。我们计算这种运动的能量作为一个大的量子数$n$的函数。我们用$mn$标识字符串级别,其中$m$是字符串包装的数量。利用AdS/CFT对应,我们证明了相应规范不变算符的裸维数为$2n$,对于大的$n$,其反常维数为λ^{1/4} \sqrt{mn}.接下来,我们考虑一个绕着$S_5$的两极脉动的多缠绕圆弦。我们计算这种运动的能量作为一个大量子数的函数,$n$,其中再次给出的字符串水平为$mn$。我们发现相应算子的维数为2n(1+f(m^2λ/(2n)^2)),其中f(x)可作为关于x=0的级数计算,并且是解析的.我们还比较了这个结果的BMN结果为大J运营商。

英文摘要:

We discuss two semiclassical string solutions on AdS_5\times S_5. In the first case, we consider a multiwrapped circular string pulsating in the radial direction of AdS_5, but fixed to a point on the S_5. We compute the energy of this motion as a function of a large quantum number $n$. We identify the string level with $mn$, where $m$ is the number of string wrappings. Using the AdS/CFT correspondence, we argue that the bare dimension of the corresponding gauge invariant operator is $2n$ and that its anomalous dimension scales as λ^{1/4}\sqrt{mn}, for large $n$. Next we consider a multiwrapped circular string pulsating about two opposite poles of the $S_5$. We compute the energy of this motion as a function of a large quantum number, $n$ where again the string level is given as $mn$. We find that the dimension of the corresponding operator is 2n(1+f(m^2λ/(2n)^2)), where f(x) is computible as a series about x=0 and where it is analytic. We also compare this result to the BMN result for large J operators.

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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