Experimental Determination of Thermal Entanglement in Spin Clusters using Magnetic Susceptibility Measurements

Abstract

The present work reports an experimental observation of thermal entanglement in a clusterized spin chain formed in the compound Na${}_2$Cu${}_5$Si${}_4$O${}_{14}$. The presence of entanglement was investigated through two measured quantities, an Entanglement Witness and the Entanglement of Formation, both derived from the magnetic susceptibility. It was found that pairwise entanglement exists below $\sim 200$ K. Tripartite entanglement was also observed below $\sim 240$ K. A theoretical study of entanglement evolution as a function of applied field and temperature is also presented.

Submited to Phys. Rev. B

References in corpus (6)

• Multipartite entanglement in spin chains
• Energy as an Entanglement Witness for Quantum Many-Body Systems
• Experimental observation of quantum entanglement in low dimensional spin systems
• Thermal Entanglement in Ferrimagnetic Chains
• Thermal entanglement of spins in mean-field clusters
• Thermal entanglement of qubit pairs on the Shastry-Sutherland lattice

Cited by in corpus (3)

• Evolution of spin entanglement and an entanglement witness in multiple-quantum NMR experiments
• Quantum Entanglement in Nitrosyl Iron Complexes
• Thermal entanglement witness for materials with variable local spin lengths