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arXiv 1206.3071cond-mat.str-elmath-phmath.MP
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描述Laughlin波函数的精确矩阵积基态一维晶格模型

One-dimensional lattice model with an exact matrix-product ground state describing the Laughlin wave function

Zheng-Yuan Wang, Masaaki Nakamura

摘要:

我们引入了一个一维晶格模型,用精确的矩阵乘积基态描述了环面几何上的分数量子Hall(HHH)态的Laughlin级数(由填充因子$ν=1/q$给出)。令人惊讶的是,精确可解的哈密顿量具有与Laughlin波函数的赝势相同的数学结构,并且自然地导出Laughlin波函数的一般性质,例如,P2 H态的$Z_2$性质和费米子-玻色子关系。所得到的精确基态与Laughlin态有很高的重叠度,很好地描述了它们的性质。利用矩阵乘积法,解析地计算了密度函数和关联函数。特别是,所获得的纠缠谱反映了Li和Halfman所讨论的无带隙边缘态。

英文摘要:

We introduce one-dimensional lattice models with exact matrix-product ground states describing the fractional quantum Hall (FQH) states in Laughlin series (given by filling factors $ν=1/q$) on torus geometry. Surprisingly, the exactly solvable Hamiltonian has the same mathematical structure as that of the pseudopotential for the Laughlin wave function, and naturally derives the general properties of the Laughlin wave function such as the $Z_2$ properties of the FQH states and the fermion-boson relation. The obtained exact ground states have high overlaps with the Laughlin states and well describe their properties. Using the matrix product method, density functions and correlation functions are calculated analytically. Especially, obtained entanglement spectra reflects gapless edge states as was discussed by Li and Haldane.

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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