The Density Matrix Renormalization Group for Strongly Correlated Electron Systems: A Generic Implementation

TL;DR

This paper introduces a flexible, fully functional implementation of the DMRG algorithm tailored for strongly correlated electron systems, emphasizing modularity, symmetry considerations, and parallelization for broad applicability.

Contribution

It presents a generic, extensible code framework for DMRG that simplifies adding new models and geometries with symmetry and parallelization support.

Findings

Efficient implementation of DMRG for various models

Support for Hamiltonian symmetries and parallelization

Facilitates research on strongly correlated electrons

Abstract

The purpose of this paper is (i) to present a generic and fully functional implementation of the density-matrix renormalization group (DMRG) algorithm, and (ii) to describe how to write additional strongly-correlated electron models and geometries by using templated classes. Besides considering general models and geometries, the code implements Hamiltonian symmetries in a generic way and parallelization over symmetry-related matrix blocks.