Multipartite quantum correlation, spatially anisotropic coupling, and finite temperature effects in a triangular Ising system with tunable interactions

TL;DR

This paper studies how spatial anisotropy and temperature affect multipartite quantum correlations in a triangular Ising model, revealing trade-offs and tunability relevant for experimental quantum systems.

Contribution

It demonstrates that anisotropic coupling can modulate quantum correlations at finite temperature, providing new insights into ground state properties and control in quantum many-body systems.

Findings

Anisotropic coupling modulates MQC in the antiferromagnetic ground state.

A three-way trade-off exists among MQC, thermal stability, and anisotropic strength.

MQC in ferromagnetic systems is highly temperature-sensitive.

Abstract

We investigate multipartite quantum correlation (MQC), spatially anisotropic coupling, and finite temperature effects in a triangular Ising system with tunable interactions using the exact diagonalization method. We demonstrate that spatially anisotropic coupling serves as an effective means to modulate MQC in the antiferromagnetic ground state, which is achievable with current experimental technologies. Moreover, we explore the interplay between MQC and spatially anisotropic coupling in the Ising system at finite temperatures. Our findings reveal a three-way trade-off relationship among high MQC, robust thermal stability, and anisotropic strength in the triangular Ising system with antiferromagnetic interactions, though the MQC in the ferromagnetic case is quite susceptible to temperature changes. These insights contribute to our understanding of ground state properties and MQC modulation in quantum many-body systems.