4 papers
Phase-tunable remote nonreciprocal charging in waveguide QED
Meixi Guo, Jian Huang, Rui-Yang Gong +2
Remote quantum batteries require directional and controllable energy transfer between spatially separated quantum nodes, yet most existing protocols rely on direct charger-battery…
Optimization landscapes of variational quantum algorithms
Xiaozhen Ge, Shuming Cheng, Guofeng Zhang +1
Optimization plays a central role in variational quantum algorithms, where the objective function typically takes the form $F(\boldsymbolθ)= \sum_{m=1}^{M} f_m \left(\mathrm{Tr}[U(…
Noise Suppression via Coherent Quantum Feedback: a Schr{ö}dinger Picture Approach
Shikun Zhang, Guofeng Zhang
In this article, we explore the possibility of achieving noise suppression for finite-dimensional quantum systems through coherent feedback. For a quantum plant which is expected t…
Closed-Loop Designed Open-Loop Control of Quantum Systems: An Error Analysis
Shikun Zhang, Guofeng Zhang
Quantum Lyapunov control, an important class of quantum control methods, aims at generating converging dynamics guided by Lyapunov-based theoretical tools. However, unlike the case…