Entanglement in supramolecular spin systems of two weakly coupled antiferromagnetic rings (purple-Cr7Ni)

Research output: Contribution to journalArticle

  • External authors:
  • A. Candini
  • G. Lorusso
  • F. Troiani
  • A. Ghirri
  • S. Carretta
  • P. Santini
  • G. Amoretti
  • C. Muryn
  • G. Timco
  • W. Wernsdorfer
  • M. Affronte


We characterize supramolecular magnetic structures, consisting of two weakly coupled antiferromagnetic rings, by low-temperature specific heat, susceptibility, magnetization and electron paramagnetic resonance measurements. Intra- and inter-ring interactions are modeled through a microscopic spin-Hamiltonian approach that reproduces all the experimental data quantitatively and legitimates the use of an effective two-qubit picture. Spin entanglement between the rings is experimentally demonstrated through magnetic susceptibility below 50 mK and theoretically quantified by the concurrence. © 2010 The American Physical Society.

Bibliographical metadata

Original languageEnglish
Article number037203
JournalPhysical Review Letters
Issue number3
Publication statusPublished - 21 Jan 2010