Volume 100, Number 5, December 2012
|Number of page(s)||6|
|Published online||10 December 2012|
Evidence for entanglement at high temperatures in an engineered molecular magnet
1 Instituto de Física, Universidade Federal Fluminense - Av. Gal. Milton Tavares de Souza s/n, 24210-346, Niterói-RJ, Brazil
2 Quantum Condensed Matter Division, Oak Ridge National Laboratory - Oak Ridge, TN 37831-6475, USA
3 Materials Science and Engineering Division, Oak Ridge National Laboratory - Oak Ridge, TN 37831-6056 USA
4 Instituto de Física de São Carlos, Universidade de São Paulo - P.O. Box 369, São Carlos, 13560-970 SP, Brazil
5 CICECO, Universidade de Aveiro - 3810-205, Aveiro, Portugal, EU
Received: 25 August 2012
Accepted: 19 November 2012
The molecular compound [Fe2(μ2-oxo)(C3H4N2)6(C2O4)2] was designed and synthesized for the first time and its structure was determined using single-crystal X-ray diffraction. The magnetic susceptibility of this compound was measured from 2 to 300 K. The analysis of the susceptibility data using protocols developed for other spin singlet ground-state systems indicates that the quantum entanglement would remain at temperatures up to 732 K, significantly above the highest entanglement temperature reported to date. The large gap between the ground state and the first-excited state (282 K) suggests that the spin system may be somewhat immune to decohering mechanisms. Our measurements strongly suggest that molecular magnets are promising candidate platforms for quantum information processing.
PACS: 03.67.Mn – Entanglement measures, witnesses, and other characterizations / 75.50.Xx – Molecular magnets / 03.67.Bg – Entanglement production and manipulation
© EPLA, 2012
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