Density Matrix Numerical Renormalization Group For Non-abelian Symmetries

A. I. Toth; C. P. Moca; OE. Legeza; G. Zarand

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Density Matrix Numerical Renormalization Group For Non-abelian Symmetries

机译：非阿贝尔对称性的密度矩阵数值归一化组

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We generalize the spectral sum rule preserving density matrix numerical renormalization group (DM-NRG) method in such a way that it can make use of an arbitrary number of not necessarily Abelian local symmetries present in the quantum impurity system. We illustrate the benefits of using non-Abelian symmetries by the example of calculations for the T matrix of the two-channel Kondo model in the presence of magnetic field, for which conventional NRG methods produce large errors and/or take a long run-time.

机译：我们以这样一种方式推广了频谱和规则保留密度矩阵数值重归一化组（DM-NRG）方法，使其可以利用量子杂质系统中存在的任意数量的不一定是阿贝尔局部对称性。我们通过在磁场存在下对两通道近藤模型的T矩阵进行计算的示例来说明使用非阿贝尔对称性的好处，传统的NRG方法会产生较大的误差和/或需要较长的运行时间。

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《Physical review》 |2008年第24期|128-138|共11页
作者
A. I. Toth; C. P. Moca; OE. Legeza; G. Zarand;
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正文语种 eng
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fermions in reduced dimensions (anyons, composite fermions, luttinger liquid, etc.); strongly correlated electron systems; heavy fermions; scattering mechanisms and kondo effect; quantum dots;

机译：尺寸减小的费米子（非离子;复合费米子;吸液剂液体等）;高度相关的电子系统;重费米子;散射机理和近藤效应;量子点;

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机译：密度矩阵数值重整化群用于非阿贝尔算子对称性

Density Matrix Numerical Renormalization Group For Non-abelian Symmetries

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