Suppression of spin-bath dynamics for improved coherence of multi-spin-qubit systems
Suppression of spin-bath dynamics for improved coherence of multi-spin-qubit systems
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DOI：
10.1038/ncomms1856
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发表时间：
2012-05-01
影响因子：
16.6
通讯作者：
Walsworth, R.
中科院分区：
文献类型：
--
作者：
Bar-Gill, N.;Pham, L. M.;Walsworth, R.
多量子比特系统对于量子科学的发展和应用至关重要。这样的系统需要保持长的相干时间，同时增加可用于相干操纵的量子位的数量。对于固态自旋系统，量子比特相干性与多体自旋动力学的基本问题密切相关。在这里，我们应用相干光谱技术来表征的动态的复合固态自旋环境的氮空位的颜色中心在室温金刚石。我们确定了一个可能的新机制，在金刚石抑制电子自旋浴动力学在存在足够的浓度的核自旋浴。这种抑制增强了动态解耦技术的功效，从而增加了多自旋量子比特系统的相干时间，从而为量子信息、传感和计量学中的应用铺平了道路。
Multi-qubit systems are crucial for the advancement and application of quantum science. Such systems require maintaining long coherence times while increasing the number of qubits available for coherent manipulation. For solid-state spin systems, qubit coherence is closely related to fundamental questions of many-body spin dynamics. Here we apply a coherent spectroscopic technique to characterize the dynamics of the composite solid-state spin environment of nitrogen-vacancy colour centres in room temperature diamond. We identify a possible new mechanism in diamond for suppression of electronic spin-bath dynamics in the presence of a nuclear spin bath of sufficient concentration. This suppression enhances the efficacy of dynamical decoupling techniques, resulting in increased coherence times for multi-spin-qubit systems, thus paving the way for applications in quantum information, sensing and metrology.