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首页> 外文期刊>Physical review. B, Condensed Matter And Materals Physics >Crossover of correlation functions near a quantum impurity in a Tomonaga-Luttinger liquid
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Crossover of correlation functions near a quantum impurity in a Tomonaga-Luttinger liquid

机译:Tomonaga-Luttinger液体中量子杂质附近的相关函数交叉

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摘要

An impurity in a Tomonaga-Luttinger liquid leads to a crossover between the short-and long-distance regime which describes many physical phenomena. However, a calculation of the entire crossover of correlation functions over different length scales has been difficult. We develop a powerful numerical method based on the infinite density matrix renormalization group. By utilizing infinite boundary conditions we can obtain correlation functions within a finite-size window that contains the impurity. For the S = 1/2 chain, we demonstrate that a full crossover can be precisely obtained, and that their limiting behaviors show a good agreement with field-theory predictions.
机译:Tomonaga-Luttinger液体中的杂质会导致短距离和长距离状态之间发生交叉,从而描述了许多物理现象。然而,在不同的长度尺度上计算相关函数的整个交叉是困难的。我们基于无限密度矩阵重归一化组开发了一种强大的数值方法。通过利用无限边界条件,我们可以获得包含杂质的有限尺寸窗口内的相关函数。对于S = 1/2链,我们证明可以精确地获得完整的交叉,并且它们的极限行为与领域理论的预测显示出良好的一致性。

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  • 来源
    《Physical review. B, Condensed Matter And Materals Physics》 |2019年第12期|121103.1-121103.5|共5页
  • 作者单位

    Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan;

    Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan;

    Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan;

    Natl Taiwan Univ, Dept Phys, Taipei 10607, Taiwan|Natl Ctr Theoret Sci, Hsinchu 30013, Taiwan;

    Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan|Natl Ctr Theoret Sci, Hsinchu 30013, Taiwan;

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