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与gl(1)相关的Gaudin模型的Bethe定理的完备性|第一章

Completeness of Bethe ansatz for Gaudin models associated with gl(1|1)

Kang Lu

摘要:

我们研究了与$\mathfrak{gl}(1|1)$相关的Gaudin模型。给出了作用于多项式求值$\mathfrak{gl}(1|1)[t]$ -模的张量积上的Hamilton算子(Gaudin Hamilton算子)的代数的一个显式描述.由此可见,在哈密顿算子代数的公共特征向量(直到比例)和以最高权和求值参数表示的显式多项式的monic因子之间存在双射。特别是,我们的结果意味着每个共同的特征空间的代数的哈密顿有一个维度。因此,我们确认了arXiv:1809.01279中的猜想8.3。我们还给出了广义特征空间的维数。此外,我们还用二次Gaudin转移矩阵和$\mathrm{U}(\mathfrak{gl}(1|1)[t])$的中心来表示与反对称化子相关的Gaudin转移矩阵的生成伪微分算子.

英文摘要:

We study the Gaudin models associated with $\mathfrak{gl}(1|1)$. We give an explicit description of the algebra of Hamiltonians (Gaudin Hamiltonians) acting on tensor products of polynomial evaluation $\mathfrak{gl}(1|1)[t]$-modules. It follows that there exists a bijection between common eigenvectors (up to proportionality) of the algebra of Hamiltonians and monic divisors of an explicit polynomial written in terms of the highest weights and evaluation parameters. In particular, our result implies that each common eigenspace of the algebra of Hamiltonians has dimension one. Therefore, we confirm Conjecture 8.3 from arXiv:1809.01279. We also give dimensions of the generalized eigenspaces. Moreover, we express the generating pseudo-differential operator of Gaudin transfer matrices associated to antisymmetrizers in terms of the quadratic Gaudin transfer matrix and the center of $\mathrm{U}(\mathfrak{gl}(1|1)[t])$.

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