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

  • Josep Batle
  • Ahmed Farouk
  • Majid Alkhambashi
  • Soliman Abdalla
Regular Article


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 Tc = 15 K.


Mesoscopic and Nanoscale Systems 


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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Josep Batle
    • 1
  • Ahmed Farouk
    • 2
  • Majid Alkhambashi
    • 3
  • Soliman Abdalla
    • 4
  1. 1.Departament de Física, Universitat de les Illes BalearsBalearic IslandsSpain
  2. 2.Computer Sciences Department, Faculty of Computers and Information, Mansoura UniversityMansoraEgypt
  3. 3.Information Technology DepartmentMuscatOman
  4. 4.Department of PhysicsFaculty of Science, Al Faisaliah Campus, King Abdulaziz UniversityJeddahSaudi Arabia

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