Eigenvectors under a generic perturbation: Non-perturbative results from the random matrix approach

Eigenvectors under a generic perturbation: Non-perturbative results from the random matrix approach
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一般扰动下的特征向量:随机矩阵方法的非扰动结果

DOI:
10.1209/0295-5075/116/37002
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发表时间:
2016
期刊:
Europhysics Letters
影响因子:
--
通讯作者:
A. Ossipov
A. Ossipov
中科院分区:
--
文献类型:
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作者:
Kevin Truong;A. Ossipov

文献摘要

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我们考虑的特征向量的哈密顿H 0扰动的一般扰动V建模的随机矩阵从高斯酉包络(GUE)。使用超对称的方法,我们得到的本征向量,这是非微扰的V和有效的任意确定性H 0的统计分析结果。此外,我们将其推广到随机H 0的情况下,特别是集中在罗森茨威格-波特模型。我们的分析预测证实了数值模拟。
We consider eigenvectors of the Hamiltonian H0 perturbed by a generic perturbation V modelled by a random matrix from the Gaussian Unitary Ensemble (GUE). Using the supersymmetry approach we derive analytical results for the statistics of the eigenvectors, which are non-perturbative in V and valid for an arbitrary deterministic H0. Further we generalise them to the case of a random H0, focusing, in particular, on the Rosenzweig-Porter model. Our analytical predictions are confirmed by numerical simulations.