题目：Engineering Robust Quantum Systems: From Algorithms to Topological Transport and Precision Sensing

报告人：李睿

时间：2026年4月16日(周四)下午15:30

地点：紫金港校区海纳苑8幢319教室

摘要：

Quantum technologies are rapidly advancing across computation, simulation, and precision sensing, yet their practical performance is fundamentally limited by noise, finite-size effects, and imperfect control. In this talk, I will present a unified perspective on designing robust and resource-efficient quantum systems across different platforms. I will first present a genetic-algorithm-based approach to constructing approximate quantum adders on near-term hardware, showing that noise-aware optimization can substantially reduce circuit complexity while maintaining high fidelity on prototype IBM Quantum processors.[1] I will then turn to topological charge pumps, where I derive analytical bounds on finite-size corrections to quantization of particle transport [2], revealing how topological protection is modified in finite systems.[3] Finally, I will present recent progress in Bragg atom interferometry, focusing on robust double Bragg diffraction (DBD) schemes enabled by detuning control[4], which enhance contrast and performance of DBD-based interferometers in precision quantum sensing.[5] Together, these results establish a unified strategy for engineering robustness in quantum systems, combining theoretical modelling with optimization and control. This framework enables high-performance operation in the presence of noise, finite-size effects, and imperfect control across diverse platforms. It thus provides a practical route toward scalable and reliable quantum devices beyond the idealized regime.

[1] R. Li, U. Alvarez-Rodriguez, L. Lamata and E. Solano, Approximate Quantum Adders with

Genetic Algorithms: An IBM Quantum Experience, Quantum Meas. Quantum Metrol. 4, 1 (2017).

[2] D. J. Thouless, Quantization of particle transport, Phys. Rev. B 27, 6083 (1983).

[3] R. Li, and M. Fleischhauer, Finite-size corrections to quantized particle transport in topological

charge pumps, Phys. Rev. B 96, 085444 (2017)

[4] R. Li, V. J. Martínez-Lahuerta, S. Seckmeyer, K. Hammerer and N. Gaaloul, Robust double

Bragg diffraction via detuning control, Phys. Rev. Research 6, 043236 (2024).

[5] R.Li, V. J. Martínez-Lahuerta, N. Gaaloul and K. Hammerer, High-contrast double Bragg

interferometry via detuning control, AVS Quantum Sci. 8, 014402 (2026) (Editor’s Pick).

个人简介：

李睿，博士。本科毕业于浙江大学，博士毕业于德国莱布尼茨汉诺威大学；硕士毕业于德国凯泽斯劳滕工业大学；曾在美国哈佛大学物理系/ITAMP开展为期一年的访问研究。主要从事原子干涉测量与超冷原子量子计量学研究，尤其侧重于双布拉格衍射干涉仪的理论建模和面向下一代量子传感器的鲁棒原子光学技术，结合有效哈密顿量推导与大规模数值模拟，对双布拉格衍射中的偏振误差、多普勒效应等缺陷进行系统分析，在失谐控制增强原子干涉鲁棒性方面取得一系列研究成果；同时在量子拓扑输运（如拓扑Thouless泵浦中的有限尺寸修正）和量子加法器（遗传算法优化及IBM量子处理器实验验证）方向亦有探索。在Phys. Rev. Lett.、Phys. Rev. Research、Phys. Rev. B、Phys. Rev. A、AVS Quantum Sci.等期刊发表论文多篇。