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arXiv 2203.09683hep-th
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二维Maxwell理论的精确$T\overline{T}$变形

Exact $T\overline{T}$ deformation of two-dimensional Maxwell theory

Luca Griguolo, Rodolfo Panerai, Jacopo Papalini, Domenico Seminara

摘要:

考虑形变参数$μ$的非微扰效应,研究了环面上的$T\overline{T}$ -形变二维量子麦克斯韦理论.我们研究了变形的配分函数在单个通量扇区的水平上求解相关的流动方程。精确求和的“瞬子”系列,我们得到了一个定义良好的表达式在任意$μ$的配分函数。对于$μ>0$,理论的量子谱经历了一个截断,配分函数在有限的正能态集合上简化为一个和。相反,对于$μ<0$,在$μ$中出现的非微扰贡献极大地改变了配分函数的结构,通过类似于瞬子的减法来正则化它的朴素发散。对于每个通量扇区,我们表明,半经典的贡献占主导地位的变形的经典行动。该理论被观察到进行无限阶相变的某些值的$μ$,与消失的Polyakov回路的振荡器。

英文摘要:

$T\overline{T}$-deformed two-dimensional quantum Maxwell theory on the torus is examined, taking into account nonperturbative effects in the deformation parameter $μ$. We study the deformed partition function solving the relevant flow equation at the level of individual flux sectors. Summing exactly the "instanton" series, we obtain a well-defined expression for the partition function at arbitrary $μ$. For $μ>0$, the quantum spectrum of the theory experiences a truncation, the partition function reducing to a sum over a finite set of positive-energy states. For $μ<0$ instead, the appearance of nonperturbative contributions in $μ$ drastically modifies the structure of the partition function, regularizing its naive divergences through instanton-like subtractions. For each flux sector, we show that the semiclassical contribution is dominated by the deformed classical action. The theory is observed to undergo infinite-order phase transitions for certain values of $μ$, associated with the vanishing of Polyakov-loop correlators.

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