Long-lived memory for mesoscopic quantum bits.
Long-lived memory for mesoscopic quantum bits.
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DOI：
10.1103/physrevlett.90.206803
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发表时间：
2003-01
影响因子：
8.6
通讯作者：
Jacob M. Taylor;C. Marcus;M. Lukin
中科院分区：
文献类型：
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作者：
Jacob M. Taylor;C. Marcus;M. Lukin
我们描述了一种在介观系统中为量子比特创建长寿命量子存储器的技术。具体来说，我们表明，电子自旋相干性可以可逆地映射到周围的核的集体状态。相干传输可以是高效和快速的，并且当与标准谐振技术结合时，它可以用于在秒的时间尺度上可逆地存储相干叠加。这种方法也可以允许“工程”纠缠态的核系综和有效地操纵存储的状态。我们通过对系统相干特性的详细分析，探讨了这种方法的可行性。
We describe a technique to create long-lived quantum memory for quantum bits in mesoscopic systems. Specifically we show that electronic spin coherence can be reversibly mapped onto the collective state of the surrounding nuclei. The coherent transfer can be efficient and fast and it can be used, when combined with standard resonance techniques, to reversibly store coherent superpositions on the time scale of seconds. This method can also allow for "engineering" entangled states of nuclear ensembles and efficiently manipulating the stored states. We investigate the feasibility of this method through a detailed analysis of the coherence properties of the system.