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arXiv 0710.2906hep-thmath-phmath.MP
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GL(1)|1)超流代数:扭转场和对数场的作用

The gl(1|1) super-current algebra: the role of twist and logarithmic fields

André LeClair

摘要:

Gl(1)的自由场表示|用两个标量场和一个辛费米子给出了任意水平k的1)_k流代数.所有表示的主要领域明确使用的扭曲和对数领域的辛费米子部门。闭算子代数在整数水平k上描述。利用一种新的涉及gl(1)的超自旋电荷分离|1)_N和su(N)_0,我们描述了gl(1)|1)_N流代数可以描述无序狄拉克费米子的非平凡临界点。本地GL(1| 1)定义了不变拉格朗日量,推广了Liouville和sine-Gordon理论。我们将这些新工具应用于自旋量子霍尔跃迁,并证明它可以描述为osp(2)的对数微扰|2)k=-2时的_k流代数。

英文摘要:

A free field representation of the gl(1|1)_k current algebra at arbitrary level k is given in terms of two scalar fields and a symplectic fermion. The primary fields for all representations are explicitly constructed using the twist and logarithmic fields in the symplectic fermion sector. A closed operator algebra is described at integer level k. Using a new super spin charge separation involving gl(1|1)_N and su(N)_0, we describe how the gl(1|1)_N current algebra can describe a non-trivial critical point of disordered Dirac fermions. Local gl(1|1) invariant lagrangians are defined which generalize the Liouville and sine-Gordon theories. We apply these new tools to the spin quantum Hall transition and show that it can be described as a logarithmic perturbation of the osp(2|2)_k current algebra at k=-2.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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