Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, 1040 Vienna, Austria.
Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543, Singapore.
Phys Rev Lett. 2018 May 25;120(21):213603. doi: 10.1103/PhysRevLett.120.213603.
We propose and analyze a novel realization of a solid-state quantum network, where separated silicon-vacancy centers are coupled via the phonon modes of a quasi-one-dimensional diamond waveguide. In our approach, quantum states encoded in long-lived electronic spin states can be converted into propagating phonon wave packets and be reabsorbed efficiently by a distant defect center. Our analysis shows that under realistic conditions, this approach enables the implementation of high-fidelity, scalable quantum communication protocols within chip-scale spin-qubit networks. Apart from quantum information processing, this setup constitutes a novel waveguide QED platform, where strong-coupling effects between solid-state defects and individual propagating phonons can be explored at the quantum level.
我们提出并分析了一种新型固态量子网络的实现方案，其中分离的硅空位中心通过准一维金刚石波导的声子模式耦合。在我们的方法中，编码在长寿命电子自旋态中的量子态可以转换为传播的声子波包，并被远处的缺陷中心有效地重新吸收。我们的分析表明，在实际条件下，这种方法能够在芯片级自旋量子比特网络中实现高保真度、可扩展的量子通信协议。除了量子信息处理，该设置还构成了一个新的波导 QED 平台，可以在量子水平上探索固态缺陷与单个传播声子之间的强耦合效应。
