Simple embedding scheme for the spectral properties of the single-impurity Anderson model

Article

关键词: NUMERICAL-RENORMALIZATION-GROUP;    DILUTE MAGNETIC-ALLOYS;    MATRIX PRODUCT STATES;    INFINITE DIMENSIONS;    TRANSITION-METALS;    SYSTEMS;    FERROMAGNETISM;   

DOI  :  10.1103/PhysRevB.95.155111

来源: SCIE

【 摘 要 】

In this work we outline a simple and numerically inexpensive approach to describe the spectral features of the single-impurity Anderson model. The method combines aspects of the density-matrix embedding theory (DMET) approach with a spectral broadening approach inspired by those used in numerical renormalization-group methods. At zero temperature for a wide range of U, the spectral function produced by this approach is found to be in good agreement with general expectations as well as more advanced and complex numerical methods such as DMRG-based schemes. The theory developed here is simply transferable to more complex impurity problems.

【 授权许可】

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