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, Iwill 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 onnear 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 transport2, 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. 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:
Rui Li recently completed his PhD in physics at Leibniz University Hannover, working in the quantum sensing group of Dr. Naceur Gaaloul and co-supervised by Prof. Klemens Hammerer. His research focuses on atom interferometry and quantum precision sensing with ultracold atoms, with particular emphasis on theoretical modeling of double Bragg diffraction interferometers and the development of robust atom-optical techniques for next-generation quantum sensors and precision measurements.
He obtained his Master’s degree in physics from the University of Kaiserslautern, where he worked with Prof. Michael Fleischhauer on topological phases in open quantum systems. During his undergraduate studies at Zhejiang University, he also visited ITAMP at Harvard University and conducted research in the group of Prof. Susanne F. Yelin, working on theoretical aspects of superradiance in quantum optical systems.
