Chebyshev matrix product state impurity solver for dynamical mean-field theory

Article

关键词: RENORMALIZATION-GROUP;    INFINITE DIMENSIONS;    MONTE-CARLO;    SYSTEMS;    FERMIONS;    MODELS;   

DOI  :  10.1103/PhysRevB.90.115124

来源: SCIE

【 摘 要 】

We compute the spectral functions for the two-site dynamical cluster theory and for the two-orbital dynamical mean-field theory in the density-matrix renormalization group (DMRG) framework using Chebyshev expansions represented with matrix product states (MPS). We obtain quantitatively precise results at modest computational effort through technical improvements regarding the truncation scheme and the Chebyshev rescaling procedure. We furthermore establish the relation of the Chebyshev iteration to real-time evolution and discuss technical aspects as computation time and implementation in detail.

【 授权许可】

Free