Quantum Information Resources in Spin-1 Heisenberg Dimer Systems

TL;DR

This paper investigates quantum information resources like coherence, entanglement, and steering in a spin-1 Heisenberg dimer system, analyzing how temperature, anisotropy, and magnetic field influence these quantum properties.

Contribution

It provides a detailed mathematical framework for analyzing quantum resources in spin-1 dimers and explores how various parameters affect their quantum correlations and coherence.

Findings

Quantum correlations can be enhanced by increasing exchange anisotropy.

Temperature increases tend to diminish quantum coherence and entanglement.

Adjusting anisotropy parameters can optimize quantum properties in the system.

Abstract

We explore the quantum information resources within bipartite pure and mixed states of the quantum spin-1 Heisenberg dimer system, considering some interesting factors such as the $l_{1}$-norm of quantum coherence, relative coherence, negativity, and steering, influenced by the magnetic field and uniaxial single-ion anisotropy. Through a thorough investigation, we derive the system's density operator at thermal equilibrium and establish a mathematical framework for analyzing quantum resource metrics. Our results unveil the system's behavior at absolute zero temperature. We further observe temperature's role in transitioning the system towards classical states, impacting coherence, entanglement, and steering differently. Notably, we find that increasing the exchange anisotropy parameter can reinforce quantum correlations while adjusting the uniaxial single-ion anisotropy influences the system's quantumness, particularly when it is positive. Some recommendations to maximize quantum coherence, entanglement, and steering involve temperature reduction, increasing the exchange anisotropy parameter, and carefully managing the magnetic field and uniaxial single-ion anisotropy parameter, highlighting the intricate interplay between these factors in maintaining the system's quantum properties.