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arXiv 1711.02468hep-th
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具有混合3-形式流的$AdS_3 \times S^3 \times S^3 \times S^1$上弦论的Yangian对称性

Yangian Symmetry of String Theory on $AdS_3 \times S^3 \times S^3 \times S^1$ with Mixed 3-form Flux

Antonio Pittelli

摘要:

我们发现了IIB型超弦在具有Ramond-Ramond和Neveu-Schwarz-Neveu-Schwarz混合流的$AdS_3 \times S^3 \times S^3 \times S^1$上的可积性的杨氏对称性。Yangian的抽象对易关系通过RTT实现来制定,而其矩阵实现则取决于Wess-Zumino项的量化系数的评估表示。该构造自然地编码了世界面散射矩阵的秘密对称性,该矩阵的生成器将不同的杨格水平映射到彼此。我们表明,在大的有效弦张力极限的杨成为一个酉圈代数的变形,我们推导出其普遍的经典r-矩阵。

英文摘要:

We find the Yangian symmetry underlying the integrability of type IIB superstrings on $AdS_3 \times S^3 \times S^3 \times S^1$ with mixed Ramond-Ramond and Neveu-Schwarz-Neveu-Schwarz flux. The abstract commutation relations of the Yangian are formulated via RTT realisation, while its matrix realisation is in an evaluation representation depending on the quantised coefficient of the Wess-Zumino term. The construction naturally encodes a secret symmetry of the worldsheet scattering matrix whose generators map different Yangian levels to each other. We show that in the large effective string tension limit the Yangian becomes a deformation of a unitary loop algebra and we derive its universal classical r-matrix.

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