Geometric phase of a bipartite system with Dzyaloshinski-Moriya interaction

TL;DR

This paper investigates how Dzyaloshinski-Moriya interaction influences the Berry phase in a bipartite Heisenberg XXZ system under a magnetic field, revealing monotonic effects and sudden phase changes.

Contribution

It provides new insights into the impact of DM interaction on Berry phase behavior in bipartite quantum systems.

Findings

DM interaction affects Berry phase monotonically

Weak magnetic fields can cause sudden Berry phase changes

Dzyaloshinski-Moriya interaction significantly influences quantum phase properties

Abstract

The Berry phase of a bipartite system described by a Heisenberg XXZ model driven by a one-site magnetic field is investigated. The effect of the Dzyaloshinski-Moriya (DM) anisotropic interaction on the Berry phase is discussed. It is found that the DM interaction affects the Berry phase monotonously, and can also cause sudden change of the Berry phase for some weak magnetic field cases.