Entanglement in Supramolecular Spin Systems of Two Weakly Coupled Antiferromagnetic Rings (Purple-Cr7Ni)
Entanglement in Supramolecular Spin Systems of Two Weakly Coupled Antiferromagnetic Rings (Purple-Cr7Ni)
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DOI：
10.1103/physrevlett.104.037203
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发表时间：
2010-01-22
影响因子：
8.6
通讯作者：
Affronte, M.
中科院分区：
文献类型：
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作者：
Candini, A.;Lorusso, G.;Affronte, M.
通过低温比热、磁化率、磁化强度和电子顺磁共振测量，我们表征了由两个弱耦合反铁磁环组成的超分子磁性结构。环内和环间的相互作用建模通过微观自旋哈密顿方法，再现所有的实验数据定量和合法的使用一个有效的两个量子位图片。环之间的自旋纠缠实验证明，通过低于50 mK的磁化率和理论上量化的并发。
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.