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arXiv 1208.3418hep-thmath-phmath.MP
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奇陪集上的超Landau模型

Super Landau Models on Odd Cosets

M. Goykhman, E. Ivanov, S. Sidorov

摘要:

我们构造了SU(n)上d=1的Wess-Zumino型西格玛模型|1)/U(n)费米子陪集。当带电粒子只具有费米子坐标时,这种模型可以被看作是经典朗道模型的一种特殊的超对称扩展(具有目标空间超对称性)。我们考虑了经典模型和量子模型,并通过在量子态的Hilbert空间上引入度量算符,使得它们的范数都是正定的,从而证明了量子模型的么正性.值得注意的是,量子n=2模型具有隐藏的SU(2| 2)对称性。我们还讨论了这些模型的平面极限。在平面n=2的情况下,Hilbert空间被证明携带SU(2| 2)不同于SU(2)的对称性|1)/U(1)模型。

英文摘要:

We construct d=1 sigma models of the Wess-Zumino type on the SU(n|1)/U(n) fermionic cosets. Such models can be regarded as a particular supersymmetric extension (with a target space supersymmetry) of the classical Landau model, when a charged particle possesses only fermionic coordinates. We consider both classical and quantum models, and prove the unitarity of the quantum model by introducing the metric operator on the Hilbert space of the quantum states, such that all their norms become positive-definite. It is remarkable that the quantum n=2 model exhibits hidden SU(2|2) symmetry. We also discuss the planar limit of these models. The Hilbert space in the planar n=2 case is shown to carry SU(2|2) symmetry which is different from that of the SU(2|1)/U(1) model.

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