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arXiv 2601.08809hep-th
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1/2 BPS Wilson环在SYM理论中的强耦合展开及AdS₅×S⁵中2-loop Green-Schwarz弦

Strong coupling expansion of $1\over 2$ BPS Wilson loop in SYM theory and 2-loop Green-Schwarz string in AdS$_5 \times $S$^5$

Università del Salento, Dipartimento di Matematica e Fisica Ennio De Giorgi(萨莱诺大学,恩尼奥·德·乔尔吉数学与物理系);INFN - sezione di Lecce(意大利国家核物理研究所,莱切分部);Abdus Salam Centre for Theoretical Physics, Imperial College London(阿卜杜斯·萨拉姆理论物理中心,伦敦帝国理工学院)

Matteo Beccaria, Stefan A. Kurlyand, Arkady A. Tseytlin

AI总结:

研究通过AdS₅×S⁵ GS弦的2-loop修正解释了强耦合下Wilson环期望值的次领头项,揭示了紫外发散对偶性检验的重要性。

摘要:

在计划性极限下,N=4 SYM理论中1/2 BPS圆形Wilson环期望值的精确局部化结果由著名的Bessel函数表达式给出:⟨W⟩=2N/√λ I₁(√λ)。在大λ和以AdS₅×S⁵弦张力T=√λ/(2π)表示的情况下,这给出⟨W⟩=√T/(2πg_s) e^{2πT} (1-3/(16π) T^{-1} + ...)。指数部分由AdS₂世界卷积上的弦作用值匹配,而前因子来自1-loop GS弦修正。本文探讨了如何通过对应的AdS₅×S⁵ GS弦在AdS₂最小表面附近展开的分区函数中的2-loop修正来重现次领头的T^{-1}项。我们发现弦修正包含非零的紫外对数发散,这意味着与SYM结果的比较需要特定的减法约定。我们讨论了这一结论对在强耦合下检验AdS/CFT对偶性的影响。

英文摘要:

The exact localization result for the expectation value of the $1\over 2$ BPS circular Wilson loop in ${\cal N}=4$ SYM theory is given in the planar limit by the famous Bessel function expression: $\langle W\rangle = {2N\over \sqrt λ} I_1 ( \sqrt λ)$. Expanded in large $λ$ and expressed in terms of the AdS$_5 \times $S$^5$ string tension $T= {\sqrt λ\over 2π}$ this gives $\langle W\rangle = {\sqrt T\over 2πg_s} e^{2πT} (1- {3\over 16 π} T^{-1} + ...)$.The exponential is matched by the value of the action of the string with the AdS$_2$ world volume while the prefactor comes from the 1-loop GS string correction. Here we address the question of how the subleading $T^{-1}$ term could be reproduced by the 2-loop correction in the corresponding partition function of the AdS$_5 \times $S$^5$ GS string expanded near the AdS$_2$ minimal surface. We find that the string correction contains a non-zero UV logarithmic divergence implying that comparison with the SYM result requires a particular subtraction prescription. We discuss implications of this conclusion for checking the AdS/CFT duality at strong coupling.

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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