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

Author

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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)

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.

Suggested Citation

  • Josep Batle & Ahmed Farouk & Majid Alkhambashi & Soliman Abdalla, 2017. "Entanglement in the linear-chain Heisenberg antiferromagnet Cu(C4H4N2)(NO3)2," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 90(3), pages 1-5, March.
    • Handle: RePEc:spr:eurphb:v:90:y:2017:i:3:d:10.1140_epjb_e2017-80004-1
    DOI: 10.1140/epjb/e2017-80004-1
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    1. Berman, Peter & Bir, Anupa, 1995. "Introduction," Health Policy, Elsevier, vol. 32(1-3), pages 3-11.
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    Keywords

    Mesoscopic and Nanoscale Systems;

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