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 similar to 200 K. Tripartite entanglement was also observed below similar to 240 K. A theoretical study of entanglement evolution as a function of applied field and temperature is also presented.

keywords

STATE; CHAINS

subject category

Physics

authors

Souza, AM; Reis, MS; Soares-Pinto, DO; Oliveira, IS; Sarthour, RS

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