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arXiv 1702.01405hep-th
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形变$ AdS_{3}\times S^{3} $上的强关联

Stringy correlations on deformed $ AdS_{3}\times S^{3} $

Dibakar Roychowdhury

摘要:

本文遵循规范/弦对偶的基本公式,在与$ κ$ -变形$ AdS_{3}\times S^{3}$对偶的规范理论中,对\textit{local}(单迹)算符间的\textit{classical}两点关联进行了强耦合计算.我们的构造是基于规范理论中的每一个局部算符与在变形$ AdS_3 $中全息屏所包围的\textit{physical}区域内传播的(半)经典弦态之间的关系。在我们的分析中,我们对待字符串是一个点,像对象附近的物理边界的$ κ$变形的欧几里德庞加莱$ AdS_{3} $和扩展对象与非平凡的动力学与$ S^{3} $。事实证明,在小的背景变形的存在下,通常的幂律行为与两个点函数的抑制指数由一个非平凡的因素,这表明一个更快的衰减的两点相关性与较大的分离。另一方面,在大背景变形($ κ\gg 1 $)的极限下,相应的两点函数达到饱和点。在我们的分析中,我们还计算了强耦合下这两个点函数的有限尺寸修正。作为我们的分析的一致性检查,我们发现我们的结果之间的完美协议,在消失变形的背景下,与早期的观察。

英文摘要:

In this paper, following the basic prescriptions of Gauge/String duality, we perform a strong coupling computation on \textit{classical} two point correlation between \textit{local} (single trace) operators in a gauge theory dual to $ κ$-deformed $ AdS_{3}\times S^{3}$ background. Our construction is based on the prescription that relates every local operator in a gauge theory to that with the (semi)classical string states propagating within the \textit{physical} region surrounded by the holographic screen in deformed $ AdS_3 $. In our analysis, we treat strings as being that of a point like object located near the physical boundary of the $ κ$- deformed Euclidean Poincare $ AdS_{3} $ and as an extended object with non trivial dynamics associated to $ S^{3} $. It turns out that in the presence of small background deformations, the usual power law behavior associated with two point functions is suppressed exponentially by a non trivial factor which indicates a faster decay of two point correlations with larger separations. On the other hand, in the limit of large background deformations ($ κ\gg 1 $), the corresponding two point function reaches a point of saturation. In our analysis, we also compute finite size corrections associated with these two point functions at strong coupling. As a consistency check of our analysis, we find perfect agreement between our results to that with the earlier observations made in the context of vanishing deformation.

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