报告题目：Towards microwave-to-optical quantum frequency conversion

报告人：Chang-Ling Zou    Key Lab of Quantum Information, University of Science and Technology of China, Hefei 230026, PR China

报告时间：2021年9月10日（周五）14：30

报告地点：理六栋302

邀请人：颜辉

报告内容：

    Quantum technology has been developed rapidly utilizing microwave and optical photons respectively. At microwave frequency, the strong single photon nonlinearity inherited from Josephson effect enables the faithful manipulation of quantum states. However, such superconducting circuits have to reside under mK temperature, in order to isolate the quantum system from large thermal noise. On the other hand, optical photons possess complementary features with microwave photons. The lack of intrinsic strong single photon nonlinearity prevents the development of multi-qubit gate with high fidelity in a scalable manner. However, the low propagation loss and decoherence rate at room-temperature make optical photons the ideal carrier of quantum states over a long distance. Thus, a coherent interface with high efficiency, low noise, and large bandwidth between optical and microwave frequencies is of paramount importance to future quantum networks. In this talk, I will present our recent efforts to realize the coherent microwave-to-optical frequency conversion. We theoretically and experimentally studied three different approaches towards the goal, based on the phonon-photon (optomechanics), magnon-photon (optomagnonics) and electro-optics interactions in integrated photonic devices.

References

1. CLZ, X. Han, L. Jiang, H. X. Tang. Phys. Rev. A 94, 013812 (2016)

2. X. Zhang, N. Zhu, CLZ, and H. X. Tang. Phys. Rev. Lett. 117, 123605 (2016)

3. L. Fan, CLZ, R. Cheng, X. Guo, X. Han, Z. Gong, S. Wang, H. X. Tang. Science Advances 4(8), eaar4994 (2018)

4. W. Wang, Y. Wu, Y. Ma, W. Cai, L. Hu, X. Mu, Y. Xu, Z.-J. Chen, H. Wang, Y. P. Song, H. Yuan, CLZ, L.-M. Duan, and L. Sun. Nature Comm. 10, 4382 (2019)

5. X. Han, W. Fu, C. Zhong, CLZ, Y. Xu, A. Sayem, M. Xu, S. Wang, R. Cheng, L. Jiang, H. X. Tang*. Nature Comm. 11, 3237 (2020)

6. Y. Xu, A. A. Sayem, L. Fan, CLZ, S. Wang, R. Cheng, W. Fu, L. Yang, M. Xu, H. X. Tang. Nature Comm. 12, 4453 (2021)

7. X. Han, W. Fu, CLZ, L. Jiang, H. Tang. Optica 8, 1050 (2021)

专家简介：

  邹长铃分别在2008年和2014年于中国科学技术大学获学士和博士学位，之后在中国科学技术大学和美国耶鲁大学开展博士后研究，2017年3月加入中国科学技术大学光学与光学工程系任副研究员，自2019年11月任特任教授。依托于郭光灿院士领导的中科院量子信息重点实验室，组建了原子-超导-光子集成芯片实验小组，主要从事量子光学与量子信息、集成量子芯片的实验和理论研究。曾荣获2012年中国光学学会“王大珩光学奖”，2016年量子信息与量子科技前沿协同创新中心“墨子杰出博士后”称号，以及2019年中国光学学会“饶毓泰基础光学奖”。主持三项自然科学基金项目，包括面上项目、优秀青年科学和国际合作基金项目。