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arXiv 0809.3948math-phhep-thmath.MPnlin.SI
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自旋Calogero模型的对称性

Symmetries of Spin Calogero Models

Vincent Caudrelier, Nicolas Crampe

摘要:

研究了由有限Coxeter群上的Dunkl算子构成的可积自旋Calogero系统的对称代数。通过两个具体的例子,证明了把一个对称代数与一个Coxeter群$W$联系起来的一般观点是错误的.更确切地说,对称代数在很大程度上取决于自旋上的$W$表示。我们证明了这一点,通过确定两个不同的对称代数的$B_L$自旋Calogero模型和三个$G_2$自旋Calogero模型。它们都与半圈代数及其扭曲形式有关。其中一些结果推广到任意有限Coxeter群。

英文摘要:

We investigate the symmetry algebras of integrable spin Calogero systems constructed from Dunkl operators associated to finite Coxeter groups. Based on two explicit examples, we show that the common view of associating one symmetry algebra to a given Coxeter group $W$ is wrong. More precisely, the symmetry algebra heavily depends on the representation of $W$ on the spins. We prove this by identifying two different symmetry algebras for a $B_L$ spin Calogero model and three for $G_2$ spin Calogero model. They are all related to the half-loop algebra and its twisted versions. Some of the result are extended to any finite Coxeter group.

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