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arXiv 1406.6444cond-mat.str-el
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加夫尼态和哈尔丹-雷扎伊量子霍尔态基元激发的薄环微扰分析

Thin torus perturbative analysis of elementary excitations in the Gaffnian and Haldane-Rezayi quantum Hall states

Amila Weerasinghe, Alexander Seidel

摘要:

我们提出了一个系统的微扰方法来研究激发薄圆柱/环面极限的量子霍尔态。该方法适用于Haldane-Rezayi和Gaffnian量子霍尔态,这两个都预计有无隙激发在通常的二维热力学极限。对于Haldane-Rezayi状态,我们确认,无隙激发也存在于“一维”的热力学极限的一个无限薄的圆柱体,与早先的考虑单独的波函数的基础上。相比之下,我们确定的薄圆柱极限的加夫尼状态的最低激发,并得出结论,他们是有间隙的,使用微扰和数值方法相结合。在这种情况下,我们讨论了二维和一维热力学极限之间的交叉可能的情况。

英文摘要:

We present a systematic perturbative approach to study excitations in the thin cylinder/torus limit of the quantum Hall states. The approach is applied to the Haldane-Rezayi and Gaffnian quantum Hall states, which are both expected to have gapless excitations in the usual two-dimensional thermodynamic limit. For the Haldane-Rezayi state, we confirm that gapless excitations are present also in the "one-dimensional" thermodynamic limit of an infinite thin cylinder, in agreement with earlier considerations based on the wave functions alone. In contrast, we identify the lowest excitations of the Gaffnian state in the thin cylinder limit, and conclude that they are gapped, using a combination of perturbative and numerical means. We discuss possible scenarios for the cross-over between the two-dimensional and the one-dimensional thermodynamic limit in this case.

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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