Hybrid Quantum Device Based on N V Centers in Diamond Nanomechanical Resonators Plus Superconducting Waveguide Cavities
Hybrid Quantum Device Based on N V Centers in Diamond Nanomechanical Resonators Plus Superconducting Waveguide Cavities
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DOI：
10.1103/physrevapplied.4.044003
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发表时间：
2015-03
影响因子：
4.6
通讯作者：
Peng-Bo Li;Yong‐Chun Liu;S.-Y. Gao;Z. Xiang;P. Rabl;Yun-Feng Xiao;Fuli Li
中科院分区：
文献类型：
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作者：
Peng-Bo Li;Yong‐Chun Liu;S.-Y. Gao;Z. Xiang;P. Rabl;Yun-Feng Xiao;Fuli Li
我们通过将微型金刚石束与单个内置氮空位（NV）中心自旋集成到超导共面波导（CPW）腔中，提出并分析了一种混合器件。我们发现在交流电场下，金刚石光束的量子化运动可以通过介电相互作用与单腔光子强烈耦合。加上通过大磁场梯度产生的强自旋运动相互作用，它提供了一种混合量子器件，其中金刚石谐振器可以与单个微波腔光子和单个 NV 中心自旋强烈耦合。这使得 NV 自旋和 CPW 腔之间能够通过机械暗极化子实现相干信息传输和有效耦合。这种混合自旋机电器件通过外部场进行可调耦合，为利用单 NV 自旋、金刚石机械谐振器和单微波光子实现量子信息提供了一个现实的平台。
We propose and analyze a hybrid device by integrating a microscale diamond beam with a single built-in nitrogen-vacancy (NV) center spin to a superconducting coplanar waveguide (CPW) cavity. We find that under an ac electric field the quantized motion of the diamond beam can strongly couple to the single cavity photons via dielectric interaction. Together with the strong spin-motion interaction via a large magnetic field gradient, it provides a hybrid quantum device where the dia- mond resonator can strongly couple both to the single microwave cavity photons and to the single NV center spin. This enables coherent information transfer and effective coupling between the NV spin and the CPW cavity via mechanically dark polaritons. This hybrid spin-electromechanical de- vice, with tunable couplings by external fields, offers a realistic platform for implementing quantum information with single NV spins, diamond mechanical resonators, and single microwave photons.