Daoyi Dong

Coherent Robust H-Infinity Control of Uncertain Linear Quantum Stochastic Systems

2015 · arXiv (Cornell University)

This paper considers a class of uncertain linear quantum systems subject to uncertain perturbations in the system Hamiltonian. We present a method to design a coherent robust H-infinity controller so that the closed loop system …

Lyapunov Control of Quantum Systems Based on Energy-Level Connectivity Graphs

2018 · IEEE Transactions on Control Systems Technology

This paper proposes a new multilayer Lyapunov control scheme based on energy-level connectivity graphs of quantum systems, which enables a high-probability population transfer to any eigenstate in high-dimensional quantum systems. We provide a graph connectivity …

On how neural networks enhance quantum state tomography with limited resources

2021 · 2021 60th IEEE Conference on Decision and Control (CDC)

Quantum state tomography is defined as a process of reconstructing the density matrix of a quantum state and is an important task for various emerging quantum technologies. In this work, we propose a general quantum …

Quantum state and detector tomography with known rank

2023 · IFAC-PapersOnLine

Quantum state tomography and quantum detector tomography are two main problems in quantum system identification. In this paper, we study state tomography and detector tomography with prior knowledge about the true rank of the unknown …

Real-time parameter estimation for two-qubit systems based on hybrid control

2024 · Physical Review A

In this paper, we consider the real-time parameter estimation problem for a ZZ-coupled system composed of two qubits in the presence of spontaneous emission. To enhance the estimation precision of the coupling coefficient, we first …