Engineering the coupling between molecular spin qubits by coordination chemistry
Engineering the coupling between molecular spin qubits by coordination chemistry
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DOI：
10.1038/nnano.2008.404
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发表时间：
2009-03-01
影响因子：
38.3
通讯作者：
Winpenny, Richard E. P.
中科院分区：
文献类型：
--
作者：
Timco, Grigore A.;Carretta, Stefano;Winpenny, Richard E. P.
组装弱相互作用子系统的能力是实现量子信息处理和产生受控纠缠的先决条件。近年来，分子纳米磁体已被提出作为量子比特编码和操纵的合适候选者。特别是，反铁磁Cr 7 Ni环在低温下表现为有效的自旋1/2系统，并显示出长的退相干时间。在这里，我们表明，这些环可以化学连接到彼此和它们的自旋之间的耦合可以通过选择链接器进行调整。我们还提出了计算，演示如何现实的微波脉冲序列可以用来产生最大的纠缠态在这样的分子。
The ability to assemble weakly interacting subsystems is a prerequisite for implementing quantum information processing and generating controlled entanglement. In recent years, molecular nanomagnets have been proposed as suitable candidates for qubit encoding and manipulation. In particular, antiferromagnetic Cr7Ni rings behave as effective spin-1/2 systems at low temperature and show long decoherence times. Here, we show that these rings can be chemically linked to each other and that the coupling between their spins can be tuned by choosing the linker. We also present calculations that demonstrate how realistic microwave pulse sequences could be used to generate maximally entangled states in such molecules.