学　术

　　由基础与前沿研究院主办的基础沙龙第36期邀请到新加坡国立大学Marc-Antoine Lemonde博士作学术交流。具体安排如下，欢迎师生们参加。

　　主　题：Phonon Networks with Silicon-Vacancy Centers in Diamond Waveguides

　　时　间：2019年11月27日（周三）10：30

　　地　点：沙河校区通信楼818室   

　　主讲人：Marc-Antoine Lemonde博士 新加坡国立大学      

　　个人简介：

　　Dr. Marc-Antoine Lemonde is a senior postdoctoral research in quantum technologies with a background in quantum optomechanics and expertises in quantum hybrid systems. Now he works in the Centre for Quantum Technologies, National University of Singapore. And his research interests are abroad, including quantum optics, quantum information processing in solid-state systems, quantum simulation of many-body physics, topological phases of matter and quantum variational algorithms for near-term quantum processors. More recently, he has been looking at classical machine learning techniques applied to quantum mechanics.

　　报告摘要：

　　I will present a novel realization of a solid-state quantum network, where separated silicon-vacancy centers are coupled via the phonon modes of a diamond structure. In our approach, quantum states encoded in long-lived electronic spin states can be converted into propagating phonon wavepackets and be reabsorbed efficiently by a distant defect center. I will first present the case of a quasi 1D crystal waveguide, where multiple (and non-chiral) phonon modes contribute to the state transfer. I will then present a more involved platform of a 2D array of optomechanical cavities, in which the phononic state transfer is performed via a chiral, single mode, topological edge state. 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, these setups constitute a novel waveguide QED platform, where strong-coupling effects between solid-state defects and individual propagating phonons can be explored at the quantum level, as well as nonlinear physics in topological systems.

　　　　　　　　　　　　　　　　　　　　　　　　　基础与前沿研究院

　　　　　　　　　　　　　　　　　　　　　　　　　 2019年11月26日