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arXiv 1902.10690hep-th
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含缺陷A^{(1)}_r Toda理论中的量子反常

Quantum anomalies in A^{(1)}_r Toda theories with defects

Silvia Penati, Davide Polvara

摘要:

研究了带亏损线的仿射Toda理论的量子可积性。特别地,我们关注的问题,构建量子高自旋守恒电流的模型定义的两个A_r^{(1)} Toda理论由一个非平凡的I型缺陷。对于一个合适的选择的缺陷势,这些理论是已知的经典可积,也就是说,他们拥有一个无限的高自旋守恒电荷的集合在对合。在量子水平上研究相应的守恒律,我们发现反常现象的出现,我们精确地计算了耦合常数的所有阶数。虽然对于应力-能量张量,这些异常可以通过缺陷势的有限重整化来消除,但我们发现,从第一个非平凡的高自旋电流开始,这不再可能。这就引出了一个问题,即这些理论在量子水平上是否确实是可积的。

英文摘要:

We study quantum integrability of affine Toda theories with a line of defect. In particular, we focus on the problem of constructing quantum higher-spin conserved currents in models defined by two A_r^{(1)} Toda theories separated by a non-trivial type-I defect. For a suitable choice of the defect potential these theories are known to be classically integrable, that is they possess an infinite set of higher-spin conserved charges in involution. Studying the corresponding conservation laws at quantum level we discover that anomalies arise, which we compute exactly at all orders in the coupling constant. While for the stress-energy tensor these anomalies can be cancelled by a finite renormalization of the defect potential, we find that from the first non-trivial higher-spin current this is no longer possible. This opens the question whether these theories are indeed integrable at quantum level.

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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