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arXiv 1303.6299cond-mat.str-elcond-mat.mes-hall
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分数量子Hall流体中集体模的解析波函数

Analytic Wavefunctions for Collective Modes in Fractional Quantum Hall Fluids

Bo Yang

摘要:

我们发现分数量子霍尔(HHH)态的中性集体模的模型波函数具有简单的解析形式,通过合理地减少基态Jastrow因子中所选对的功率得到。这种“对激发”方案适用于单分量阿贝尔和非阿贝尔的M-H态的磁旋子模式,以及Moore-Read(MR)态的中性费米子模式。解析波函数使计算在热力学极限以前无法访问的数字,和长波长的限制中性能隙的磁旋子模式可以解释为在二维等离子体图片的电荷融合,扩展等离子体类比中性激发。本文还提出了一种表示这些多体波函数和多体元激发的格点图解法。

英文摘要:

We show model wavefunctions for neutral collective modes in fractional quantum Hall (FQH) states have simple analytic forms obtained from judicially reducing the powers of selected pairs in the ground state Jastrow factor. This scheme of "pair excitations" works for the magneto-roton modes of single-component Abelian and non-Abeliean FQH states, as well as neutral fermion mode for the Moore-Read (MR) state. The analytic wavefunctions enable computations in the thermodynamic limit previous inaccessible to numerics, and the long wavelength limit of the neutral energy gap of the magneto-roton modes can be interpreted as fusion of charges in two-dimensional plasma picture, extending the plasma analogy to neutral excitations. A lattice diagrammatic method of representing these many-body wavefunctions and FQH elementary excitations is also presented.

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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