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arXiv 0909.3109hep-thmath-phmath.MP
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作为扩展mKdV族费米对称流的仿射Toda模型的超对称性

Supersymmetry of Affine Toda Models as Fermionic Symmetry Flows of the Extended mKdV Hierarchy

David M. Schmidtt

摘要:

我们耦合的两个副本的超对称mKdV层次的代数敷料技术的装置。这允许推导出整套的$(N,N)$超对称变换的相对论部门的扩展mKdV的层次,并解释为费米子对称流。该构造基于半整数阶仿射Kac-Moody超代数的扩展Riemann-Hilbert问题。本文介绍了一组广义的类相对论费米子局域电流恒等式,并指出最简单的一个对应于最低等谱时间$t_{\pm 1}$的恒等式提供了在二维超空间中产生刚性超对称变换的超荷.超荷的数量等于一个给定的半单元素$E \in \widehat{\mathfrak{g}}$的费米子核的维数,它定义了模型的物理自由度和对称性。将该一般结构应用于$N=(1,1)$和$N=(2,2)$ sinh-Gordon模型中,并详细推导了模型的计算公式。

英文摘要:

We couple two copies of the supersymmetric mKdV hierarchy by means of the algebraic dressing technique. This allows to deduce the whole set of $(N,N)$ supersymmetry transformations of the relativistic sector of the extended mKdV hierarchy and to interpret them as fermionic symmetry flows. The construction is based on an extended Riemann-Hilbert problem for affine Kac-Moody superalgebras with a half-integer gradation. A generalized set of relativistic-like fermionic local current identities is introduced and it is shown that the simplest one, corresponding to the lowest isospectral times $t_{\pm 1}$ provides the supercharges generating rigid supersymmetry transformations in 2D superspace. The number of supercharges is equal to the dimension of the fermionic kernel of a given semisimple element $E \in \widehat{\mathfrak{g}}$ which defines both, the physical degrees of freedom and the symmetries of the model. The general construction is applied to the $N=(1,1)$ and $N=(2,2)$ sinh-Gordon models which are worked out in detail.

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