Entanglement in the linear-chain Heisenberg antiferromagnet Cu(C4H4N2)(NO3)2

Josep Batle (), Ahmed Farouk, Majid Alkhambashi and Soliman Abdalla
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Josep Batle: Departament de Física, Universitat de les Illes Balears
Ahmed Farouk: Computer Sciences Department, Faculty of Computers and Information, Mansoura University
Majid Alkhambashi: Information Technology Department
Soliman Abdalla: Faculty of Science, Al Faisaliah Campus, King Abdulaziz University

The European Physical Journal B: Condensed Matter and Complex Systems, 2017, vol. 90, issue 3, 1-5

Abstract: Abstract Quantum correlations are generally impossible to address directly in bulk systems. Quantum measures extended only to a few number of parties can be discussed in practice. In the present work we study a cluster of spins belonging to a compound whose structure is that of a quantum magnet. We reproduce at a much smaller scale the experimental outcomes and then we study the role of quantum correlations there. A macroscopic entanglement witness has been introduced in order to reveal quantum correlations at nonzero temperatures. The critical point beyond which entanglement is zero is found at T c = 15 K.

Keywords: Mesoscopic; and; Nanoscale; Systems (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1140/epjb/e2017-80004-1

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