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arXiv 1310.2263cond-mat.str-elcond-mat.mes-hall
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1/3和7/3量子霍尔态的准空穴:精确对角化和密度矩阵重整化群方法估计

Quasiholes of 1/3 and 7/3 quantum Hall states: size estimates via exact diagonalization and density-matrix renormalization group

Sonika Johri, Zlatko Papić, R. N. Bhatt, P. Schmitteckert

摘要:

通过精确对角化和密度矩阵重整化群计算,我们确定了$ν=1/3$和$ν=7/3$量子霍尔态中基本准空穴的大小.在填充因子$ν=1/3$下的准空穴尺寸估计为$\approx 4\ell_B$,$ν=7/3$的准空穴尺寸估计为$\approx 7\ell_B$,其中$\ell_B$是磁性长度。相比之下,劳克林准洞的大小,预计捕捉这两个国家的基本物理,是大约$\approx 2.5\ell_B$。我们的工作支持了早先的发现,即准空穴在第一激发朗道能级是显着大于在最低朗道能级。

英文摘要:

We determine the size of the elementary quasihole in $ν=1/3$ and $ν=7/3$ quantum Hall states via exact-diagonalization and density-matrix renormalization group calculations on the sphere and cylinder, using a variety of short- and long-range pinning potentials. The size of the quasihole at filling factor $ν=1/3$ is estimated to be $\approx 4\ell_B$, and that of $ν=7/3$ is $\approx 7\ell_B$, where $\ell_B$ is the magnetic length. In contrast, the size of the Laughlin quasihole, expected to capture the basic physics in these two states, is around $\approx 2.5\ell_B$. Our work supports the earlier findings that the quasihole in the first excited Landau level is significantly larger than in the lowest Landau level.

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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