Engineering coherent interactions in molecular nanomagnet dimers
Engineering coherent interactions in molecular nanomagnet dimers
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DOI：
10.1038/npjqi.2015.12
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发表时间：
2015-01-01
影响因子：
7.6
通讯作者：
Winpenny, Richard E. P.
中科院分区：
文献类型：
--
作者：
Ardavan, Arzhang;Bowen, Alice M.;Winpenny, Richard E. P.
包含凝聚态自旋量子比特的系统提案涵盖了非常广泛的长度尺度，从半导体中的原子缺陷一直到微米级的光刻定义结构。中等规模的分子组件表现出两种限制的优点：像原子缺陷，可以制造大量相同的组件;至于光刻定义的结构，每个组件可以定制，以优化性能，如量子相干性。在这里，我们展示了分子自旋量子比特最强大的优势，即使用自下而上化学自组装的量子信息处理结构的可扩展性。使用Cr 7 Ni自旋量子比特构建块，我们已经构建了几个家庭的两个量子比特分子结构的一系列连接策略。对于每个家庭，长的相干时间被保留，并且我们展示了对可用于调解两个量子比特量子门的量子比特间量子相互作用的控制。
Proposals for systems embodying condensed matter spin qubits cover a very wide range of length scales, from atomic defects in semiconductors all the way to micron-sized lithographically defined structures. Intermediate scale molecular components exhibit advantages of both limits: like atomic defects, large numbers of identical components can be fabricated; as for lithographically defined structures, each component can be tailored to optimise properties such as quantum coherence. Here we demonstrate what is perhaps the most potent advantage of molecular spin qubits, the scalability of quantum information processing structures using bottom-up chemical self-assembly. Using Cr7Ni spin qubit building blocks, we have constructed several families of two-qubit molecular structures with a range of linking strategies. For each family, long coherence times are preserved, and we demonstrate control over the inter-qubit quantum interactions that can be used to mediate two-qubit quantum gates.