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arXiv 2209.08653hep-thmath-phmath.MP
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二维CFT的环面单点块与$\hat{\mathfrak{sl_2}}$中的零向量

The torus one-point block of 2d CFT and null vectors in $\hat{\mathfrak{sl_2}}$

Dario Stocco

摘要:

本文分为两部分,第一部分在Zamolodchikov递归关系的框架下研究了环面上Virasoro单点块的计算。人们普遍认为这种递归关系式在中心荷$c$中含有非物理极点。在每一阶上,我们推测了无极点表达式如何依赖于内、外共形维数和中心荷,并提出了如何数值计算它。在这篇论文中,我们计算了四阶极点自由表达式。在第二部分中,我们介绍了一个共形场论与一个额外的对称性,描述的最高权表示的仿射李代数$\hat{\mathfrak{sl}}_2$。在第1级,我们确定了一个通用的$\mathfrak{sl}_2$基地独立的“空运算符”,它产生通常意义上的空向量。“空运算符”是广义对象,可以应用于水平表示的任何状态,产生空向量,因此与水平表示的选择无关。

英文摘要:

This thesis is divided into two parts, where in the first part we investigate the computation of Virasoro 1-point blocks on the torus in the framework of Zamolodchikov's recursion relation. It is widely accepted that this recursion relation contains unphysical poles in the central charge $c$. At each order we conjecture how the pole free expressions depend on the internal and external conformal dimensions and central charge, and propose how to compute it numerically. In this thesis, we have calculated the pole free expression up to order 4. In the second part we introduce a conformal field theory with an extra symmetry, described by highest weight representations of the affine Lie algebra $\hat{\mathfrak{sl}}_2$. At level 1, we determined a universal $\mathfrak{sl}_2$ basis-independent 'null operator', which generates null vectors in the usual sense. The 'null operators' are generalized objects and can be applied to any state of the horizontal representation, yielding null vectors and are therefore independent from the choice of horizontal representations.

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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