Large-Scale Numerical Evidence for Bose Condensation in the S=1 Antiferromagnetic Chain in a Strong Field

TL;DR

This paper uses advanced numerical methods to demonstrate that magnons in a specific quantum spin chain behave as bosons and undergo condensation at a critical magnetic field, providing strong numerical evidence for Bose condensation.

Contribution

It provides the first large-scale numerical evidence supporting Bose condensation of magnons in the S=1 antiferromagnetic Heisenberg chain under strong magnetic fields.

Findings

Magnons behave as bosons in the S=1 chain.

Magnons condense at a critical magnetic field h_c.

Numerical evidence supports Bose condensation in this system.

Abstract

Using the recently proposed density matrix renormalization group technique we show that the magnons in the S=1 antiferromagnetic Heisenberg chain effectively behaves as bosons that condense at a critical field h_c.