Ground-State Dynamical Correlation Functions: An Approach from Density Matrix Renormalization Group Method

Hanbin Pang; H. Akhlaghpour; M. Jarrell

doi:10.1103/physrevb.53.5086

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Ground-State Dynamical Correlation Functions: An Approach from Density Matrix Renormalization Group Method

Hanbin Pang·H. Akhlaghpour·M. Jarrell

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Abstract

A numerical approach to ground-state dynamical correlation functions from Density Matrix Renormalization Group (DMRG) is developed. Using sum rules, moments of a dynamic correlation function can be calculated with DMRG, and with the moments the dynamic correlation function can be obtained by the maximum entropy method. We apply this method to one-dimensional spinless fermion system, which can be converted to the spin 1/2 Heisenberg model in a special case. The dynamical density-density correlation function is obtained.

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Hanbin Pang, H. Akhlaghpour, M. Jarrell. 1995-02-22. Ground-State Dynamical Correlation Functions: An Approach from Density Matrix Renormalization Group Method. https://doi.org/10.1103/physrevb.53.5086

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