Evidence for entanglement at high temperatures in an engineered molecular magnet


The molecular compound [Fe-2(mu(2)-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. Copyright (C) EPLA, 2012






Reis, MS; Soriano, S; dos Santos, AM; Sales, BC; Soares-Pinto, DO; Brandao, P

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MSR thanks FAPERJ, CAPES, CNPq and PROPPi-UFF for the financial support. AMS (QCMD) acknowledges support from the Scientific User Facilities Division, and the Office of Basic Energy Sciences of the US Department of Energy. BCS was supported by the US Department of Energy, Office of Basic Energy Sciences, Materials Sciences and Engineering Division. DOS-P would like to thank the Brazilian funding agency CNPq for the financial support. PB thanks the collaboration project FCT/CAPES/2011/2012 between Portugal and Brasil. The authors would like to thank Dr. P. HYLLUS for indicating ref. [7] and Prof. G. TOTH for fruitful correspondence.

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