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Candini A, Lorusso G, Troiani F, et al. Entanglement in supramolecular spin systems of two weakly coupled antiferromagnetic rings (purple-Cr7Ni). Phys Rev Lett. 2010;104(3):037203doi: 10.1103/PhysRevLett.104.037203.
Candini, A., Lorusso, G., Troiani, F., Ghirri, A., Carretta, S., Santini, P., Amoretti, G., Muryn, C., Tuna, F., Timco, G., McInnes, E. J., Winpenny, R. E., Wernsdorfer, W., & Affronte, M. (2010). Entanglement in supramolecular spin systems of two weakly coupled antiferromagnetic rings (purple-Cr7Ni). Physical review letters, 104(3), 037203. https://doi.org/10.1103/PhysRevLett.104.037203
Candini, A, et al. "Entanglement in supramolecular spin systems of two weakly coupled antiferromagnetic rings (purple-Cr7Ni)." Physical review letters vol. 104,3 (2010): 037203. doi: https://doi.org/10.1103/PhysRevLett.104.037203
Candini A, Lorusso G, Troiani F, Ghirri A, Carretta S, Santini P, Amoretti G, Muryn C, Tuna F, Timco G, McInnes EJ, Winpenny RE, Wernsdorfer W, Affronte M. Entanglement in supramolecular spin systems of two weakly coupled antiferromagnetic rings (purple-Cr7Ni). Phys Rev Lett. 2010 Jan 22;104(3):037203. doi: 10.1103/PhysRevLett.104.037203. Epub 2010 Jan 21. PMID: 20366678.
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Phys Rev Lett. 2010 Jan 22;104(3):037203. doi: 10.1103/PhysRevLett.104.037203. Epub 2010 Jan 21.

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

Physical review letters

A Candini, G Lorusso, F Troiani, A Ghirri, S Carretta, P Santini, G Amoretti, C Muryn, F Tuna, G Timco, E J L McInnes, R E P Winpenny, W Wernsdorfer, M Affronte

Affiliations

  1. National Research Center on nanoStructures and bioSystems at Surfaces (S3), CNR-INFM, 41100 Modena, Italy.

PMID: 20366678 DOI: 10.1103/PhysRevLett.104.037203

Abstract

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.

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