Magnetization Process of One-Dimensional Quantum Antiferromagnet: The Product Wavefunction Renormalization Group Approach

TL;DR

This paper applies a new numerical method, the product-wavefunction renormalization group, to one-dimensional quantum antiferromagnetic spin chains in a magnetic field, successfully reproducing the exact magnetization curve at zero temperature.

Contribution

It introduces and demonstrates the effectiveness of the product-wavefunction renormalization group method for analyzing quantum spin chains in magnetic fields.

Findings

Accurately reproduces the exact zero-temperature magnetization curve.

Validates the method's applicability across the entire magnetic field range.

Abstract

The product-wavefunction renormalization group method, which is a novel numerical renormalization group scheme proposed recently,is applied to one-dimensional quantum spin chains in a magnetic field. We draw the zero-temperature magnetization curve of the spin chains, which excellently agrees with the exact solution in the whole range of the field.