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arXiv 0706.4469cond-mat.mes-hallcond-mat.str-el
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不可压缩分数量子Hall态的密度矩阵重整化群研究

Density Matrix Renormalization Group Study of Incompressible Fractional Quantum Hall States

A. E. Feiguin, E. Rezayi, C. Nayak, S. Das Sarma

摘要:

我们发展了密度矩阵重整化群(DMRG)方法来数值研究球上的不可压缩分数量子霍尔态。我们计算了精确对角化方法所研究的最大体系的基态能量和激发能隙的精确估计值,并计算了填充率为1/3和5/2的体系的基态能量和激发能隙.我们建立,通过仔细比较现有的数值结果较小的系统,DMRG是一个非常有效的数值工具,研究不可压缩的COLH状态。

英文摘要:

We develop the Density Matrix Renormalization Group (DMRG) technique for numerically studying incompressible fractional quantum Hall (FQH) states on the sphere. We calculate accurate estimates for ground state energies and excitationgaps at FQH filling fractions ν=1/3 and ν=5/2 for systems that are almost twice as large as the largest ever studied by exact diagonalization. We establish, by carefully comparing with existing numerical results on smaller systems, that DMRG is a highly effective numerical tool for studying incompressible FQH states.

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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