Quantum Interference of Electromechanically Stabilized Emitters in Nanophotonic Devices
Quantum Interference of Electromechanically Stabilized Emitters in Nanophotonic Devices
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DOI：
10.1103/physrevx.9.031022
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发表时间：
2019-08-09
影响因子：
12.5
通讯作者：
Loncar, M.
中科院分区：
文献类型：
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作者：
Machielse, B.;Bogdanovic, S.;Loncar, M.
光子介导的近距离量子位之间的光子介导的耦合可以在长距离内实现安全通信，分布式量子计算方案的实现以及探索多体量子动力学的新机制。固态量子发射器耦合到纳米光子设备，代表了针对这些目标的一种有希望的方法，因为它们结合了强烈的轻度相互作用和较高的光子收集效率。但是，纳米结构环境引入了发射器的光学过渡频率的不匹配和扩散，使可靠的光子介导的纠缠产生不可行。在这里，我们通过采用嵌入在机电上可偏转的纳米光量波导中的硅成式颜色中心来解决这一长期存在的挑战。这种机电应变控制能够控制和稳定在小时时间尺度上两个硅离散中心之间的光学共振。使用此平台，我们观察到由两个在波导中的空间分离发射器之间的量子干扰引起的纠缠，上级状态的特征。该演示和开发的平台构成了朝着具有固态量子发射器的可扩展量子网络的关键步骤。
Photon-mediated coupling between distant matter qubits may enable secure communication over long distances, the implementation of distributed quantum computing schemes, and the exploration of new regimes of many-body quantum dynamics. Solid-state quantum emitters coupled to nanophotonic devices represent a promising approach towards these goals, as they combine strong light-matter interaction and high photon collection efficiencies. However, nanostructured environments introduce mismatch and diffusion in optical transition frequencies of emitters, making reliable photon-mediated entanglement generation infeasible. Here we address this long-standing challenge by employing silicon-vacancy color centers embedded in electromechanically deflectable nanophotonic waveguides. This electromechanical strain control enables control and stabilization of optical resonance between two silicon-vacancy centers on the hour timescale. Using this platform, we observe the signature of an entangled, superradiant state arising from quantum interference between two spatially separated emitters in a waveguide. This demonstration and the developed platform constitute a crucial step towards a scalable quantum network with solid-state quantum emitters.