Memory,Time and Technique Aspects of Density Matrix Renormalization Group Method
Qin Shao-Jin, Lou Ji-Zhong · Communications in Theoretical Physics · 2001
We present the memory size,computational time,and technique aspects of density matrix renormalization group (DMRG) algorithm.We show how to estimate the memory size and computational time before starting a large scale DMRG calculation.We propose an implementation of the Hamiltonian wavefunction multiplication and a wavefunction initialization in DMRG with block matrix data structure.One-dimensional Heisenberg model is used to illustrate our study.