Entanglement Measure-Based Sliding Mode Control for Quantum State Preparation
提出一种利用纠缠度量作为滑模面的控制框架，无需预设目标态即可生成多种纠缠态，适用于双体和多体系统，并通过数值仿真验证了有效性。
Entangled states are fundamental to quantum information processing. However, many existing quantum control methods rely on predefined target states, limiting their flexibility in accommodating diverse entanglement structures. This article introduces a sliding mode control framework that utilizes an entanglement measure as the sliding surface, enabling the generation of entangled states without specifying a fixed target. By adjusting the desired entanglement level, the proposed method can generate a wide range of states, including both bipartite and multipartite configurations, as well as pure and mixed states. Since the entanglement measure is scalar-valued, the resulting control law is inherently independent of the number of subsystems-an important advantage of the proposed approach. Among various entangled states, maximally entangled states (MESs) are of particular interest. Lyapunov stability of the control scheme is established, and numerical simulations confirm its effectiveness in robustly generating MESs in both bipartite and multipartite systems.