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arXiv 1505.04553hep-thgr-qcmath-phmath.MPnlin.SI
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Minkowski时空的Yang-Baxter形变

Yang-Baxter deformations of Minkowski spacetime

Takuya Matsumoto, Domenico Orlando, Susanne Reffert, Jun-ichi Sakamoto, Kentaroh Yoshida

摘要:

研究了四维Minkowski时空的Yang-Baxter形变。杨-巴克斯特西格玛模型描述最初是基于修改的经典杨-巴克斯特方程的主要手性模型。它已被推广到陪集曲线空间和模型的基础上通常的经典杨巴克斯特方程。另一方面,对于平坦空间,如果我们使用熟悉的陪集庞加莱群/洛伦兹群,则存在标准双线性型退化的明显问题。相反,我们考虑一个切片的AdS $_5$通过嵌入4D庞加莱群到4D共形群$SO(2,4)$。用这个过程,我们得到度量和$B$ -场作为杨-巴克斯特变形,对应于众所周知的配置,如T-梅尔文背景,桥本-Sethi和Spradlin-Takayanagi-Volovich背景,T-对偶的格兰特空间,pp-波,和T-双的dS $_4$和AdS $_4$。最后,我们考虑了一个具有经典的Drinfeld-Jimbo型$r$ -矩阵的变形,并明确地导出了相应的度量和$B$ -场,我们猜想它们对应于一个新的可积系统.

英文摘要:

We study Yang-Baxter deformations of 4D Minkowski spacetime. The Yang-Baxter sigma model description was originally developed for principal chiral models based on a modified classical Yang-Baxter equation. It has been extended to coset curved spaces and models based on the usual classical Yang-Baxter equation. On the other hand, for flat space, there is the obvious problem that the standard bilinear form degenerates if we employ the familiar coset Poincaré group/Lorentz group. Instead we consider a slice of AdS$_5$ by embedding the 4D Poincaré group into the 4D conformal group $SO(2,4)$. With this procedure we obtain metrics and $B$-fields as Yang-Baxter deformations which correspond to well-known configurations such as T-duals of Melvin backgrounds, Hashimoto-Sethi and Spradlin-Takayanagi-Volovich backgrounds, the T-dual of Grant space, pp-waves, and T-duals of dS$_4$ and AdS$_4$. Finally we consider a deformation with a classical $r$-matrix of Drinfeld-Jimbo type and explicitly derive the associated metric and $B$-field which we conjecture to correspond to a new integrable system.

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