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arXiv 2408.09714hep-thmath-phmath.MPnlin.SI
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辅助场Sigma模型与Yang-Baxter形变

Auxiliary Field Sigma Models and Yang-Baxter Deformations

Daniele Bielli, Christian Ferko, Liam Smith, Gabriele Tartaglino-Mazzucchelli

AI总结:

本研究结合Yang-Baxter、双Yang-Baxter形变与高自旋辅助场形变,构造了半单李群上主手征模型的多参数可积形变族,并通过Lax表示证明其弱经典可积性。

摘要:

我们将Yang-Baxter(YB,杨-巴克斯特)形变、双Yang-Baxter(bi-YB,双杨-巴克斯特)形变与高自旋辅助场形变相结合,构造了定义在李群$G$(其李代数$\frak{g}$为半单李代数)上的主手征模型的多参数可积形变族。在YB情形下,我们的构造针对每一对$(\frak{R}, E)$生成一个可积形变,其中$\frak{R}$是$\frak{g}$上满足修正经典Yang-Baxter方程的反对称双线性算子,$E$是一个多变量函数。在bi-YB情形下,上述配对变为三元组$(\frak{R},\tilde{\frak{R}}, E)$,其中$\tilde{\frak{R}}$是$\frak{g}$上的另一个反对称双线性算子,满足非分裂非齐次修正经典Yang-Baxter方程。我们通过给出这些模型运动方程的Lax表示,证明了该族中的每一个模型都具有(弱)经典可积性。

英文摘要:

We combine the Yang-Baxter (YB) and bi-Yang-Baxter (bi-YB) deformations with higher-spin auxiliary field deformations to construct multi-parameter families of integrable deformations of the principal chiral model on a Lie group $G$ with semi-simple Lie algebra $\mathfrak{g}$. In the YB case, our construction produces one integrable deformation for each pair $(\mathcal{R}, E)$, where $\mathcal{R}$ is an antisymmetric bilinear operator on $\mathfrak{g}$ obeying the modified classical Yang-Baxter equation and $E$ is a function of several variables. In the bi-YB case, the pair becomes a triplet $(\mathcal{R},\tilde{\mathcal{R}}, E)$, where $\tilde{\mathcal{R}}$ is another antisymmetric bilinear operator on $\mathfrak{g}$ and obeys the non-split inhomogeneous modified classical Yang-Baxter equation. We show that every model in these families is (weakly) classically integrable by exhibiting a Lax representation for their equations of motion.

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