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arXiv 1310.7622hep-th
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关于超多项式的亏格展开

On genus expansion of superpolynomials

A. Mironov, A. Morozov, A. Sleptsov, A. Smirnov

摘要:

最近证明了HOMFLY多项式的(Ooguri-Vafa)生成函数是Hurwitz配分函数,即HOMFLY多项式对表示R的依赖性自然地被对称群特征(割并特征值)捕获。亏格扩张和通过Vassiliev不变量的扩张明确地证明了这一现象。在这封信中,我们声称超多项式不是这样一种类型的函数:对称群字符不提供足够的线性基础,其扩展。然而,在乘法基中,变形为超多项式是简单的:卡西米尔算子被β变形为卡洛格罗-莫泽-萨瑟兰系统的哈密顿算子。将这个技巧应用到亏格和瓦西里耶夫展开式上,我们观察到,只有对于薄结点,变形才是完全直接的。除了家庭的薄结额外的代数独立的条款出现在瓦西里耶夫和属展开。这表明超多项式实际上比有色HOMFLY和考夫曼多项式包含更多关于节点的信息。然而,即使对于薄结,β-变形也是非无辜的:在最简单的例子中,它似乎与非(反对)对称表示中的有色超多项式的正性不一致,这也发生在I.Cherednik(基于DAHA)的环面结方法中。

英文摘要:

Recently it was shown that the (Ooguri-Vafa) generating function of HOMFLY polynomials is the Hurwitz partition function, i.e. that the dependence of the HOMFLY polynomials on representation R is naturally captured by symmetric group characters (cut-and-join eigenvalues). The genus expansion and expansion through Vassiliev invariants explicitly demonstrate this phenomenon. In the present letter we claim that the superpolynomials are not functions of such a type: symmetric group characters do not provide an adequate linear basis for their expansions. Deformation to superpolynomials is, however, straightforward in the multiplicative basis: the Casimir operators are β-deformed to Hamiltonians of the Calogero-Moser-Sutherland system. Applying this trick to the genus and Vassiliev expansions, we observe that the deformation is fully straightforward only for the thin knots. Beyond the family of thin knots additional algebraically independent terms appear in the Vassiliev and genus expansions. This can suggest that the superpolynomials do in fact contain more information about knots than the colored HOMFLY and Kauffman polynomials. However, even for the thin knots the beta-deformation is non-innocent: already in the simplest examples it seems inconsistent with the postivity of colored superpolynomials in non-(anti)symmetric representations, which also happens in I.Cherednik's (DAHA-based) approach to the torus knots.

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