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arXiv 1009.4199cond-mat.str-elcond-mat.mes-hall
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Laughlin态有限尺寸纠缠谱的Half统计

Haldane Statistics in the Finite Size Entanglement Spectra of Laughlin States

M. Hermanns, A. Chandran, N. Regnault, B. Andrei Bernevig

摘要:

我们推测,填充$ν=1/m$的有限尺寸Laughlin分数量子霍尔(Laughlin Fractional Quantum Hall,HHH)液滴的轨道纠缠谱(OES)中的能级计数可以用有限尺寸盒子中粒子的Haldom统计来描述.这一原理解释了OES计数与边模共形场论计数的观测偏差,并直接为我们提供了在热力学极限--玻色子紧化半径--中无法达到的OES态的拓扑数。它还表明,在共形极限的库仑谱中的纠缠间隙保护一个普遍的量-统计的状态。我们用充分的数值检验来支持我们的猜想。

英文摘要:

We conjecture that the counting of the levels in the orbital entanglement spectra (OES) of finite-sized Laughlin Fractional Quantum Hall (FQH) droplets at filling $ν=1/m$ is described by the Haldane statistics of particles in a box of finite size. This principle explains the observed deviations of the OES counting from the edge-mode conformal field theory counting and directly provides us with a topological number of the FQH states inaccessible in the thermodynamic limit- the boson compactification radius. It also suggests that the entanglement gap in the Coulomb spectrum in the conformal limit protects a universal quantity- the statistics of the state. We support our conjecture with ample numerical checks.

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