Monogamy of quantum correlations reveals frustration in a quantum Ising spin system: Experimental demonstration

TL;DR

This paper demonstrates experimentally how the monogamy of quantum correlations can distinguish frustrated from non-frustrated regimes in a quantum Ising spin system using nuclear magnetic resonance techniques.

Contribution

It provides the first experimental verification that monogamy of quantum correlations reveals frustration in a quantum Ising model.

Findings

Non-frustrated regime exhibits higher multipartite quantum correlations.

Experimental results align with theoretical predictions.

Quantum correlations can serve as indicators of frustration in spin systems.

Abstract

We report a nuclear magnetic resonance experiment, which simulates the quantum transverse Ising spin system in a triangular configuration and further show that the monogamy of quantum correlations can be used to distinguish between the frustrated and non-frustrated regimes in the ground state of this system. Adiabatic state preparation methods are used to prepare the ground states of the spin system. We employ two different multipartite quantum correlation measures to analyze the experimental ground state of the system in both the frustrated and non-frustrated regimes. In particular, we use multipartite quantum correlation measures generated by monogamy considerations of negativity, a bipartite entanglement measure, and that of quantum discord, an information-theoretic quantum correlation measure. As expected from theoretical predictions, the experimental data confirm that the non-frustrated regime shows higher multipartite quantum correlations compared to the frustrated one.