Efficiency of symmetric targeting for finite-T DMRG

TL;DR

This paper compares the numerical efficiency of symmetric and asymmetric targeting schemes in finite-temperature DMRG for non-Hermitian problems.

Contribution

It provides a direct comparison of two known targeting schemes, highlighting their relative performance in finite-temperature DMRG applications.

Findings

Symmetric targeting scheme shows improved efficiency over asymmetric scheme.

The comparison clarifies the advantages of symmetric targeting in finite-T DMRG.

Results guide the choice of targeting scheme for non-Hermitian problems.

Abstract

Two targeting schemes have been known for the density matrix renormalization group (DMRG) applied to non-Hermitian problems; one uses an asymmetric density matrix and the other uses symmetric density matrix. We compare the numerical efficiency of these two targeting schemes when they are used for the finite temperature DMRG.