论文标题

量子稳定的耗散反馈切换

Dissipative Feedback Switching for Quantum Stabilization

论文作者

Liang, Weichao, Grigoletto, Tommaso, Ticozzi, Francesco

论文摘要

切换控制的动力学可实现快速,灵活的控制设计方法,用于纯状态和子空间的量子稳定,自然地包括哈密顿量和耗散控制动作。引入了一种基于测量的,耗散反馈设计的新型方法,并扩展了相对于先前提出的技术的转换技术的适用性,因为它不需要严格的不变性假设,而它仍然可以通过调节控制强度来避免不受欢迎的chat不休或ZENO效应。另一方面,当开关动力学确实会使目标不变性留下不变性时,我们表明可以在没有调制的情况下执行指数的收敛,并且可以固定或滞后的切换时间,以避免聊天。通过简单但范式的示例的数值模拟来说明了所提出方法的有效性,这表明开关策略如何比开环工程耗散更快地收敛。

Switching controlled dynamics allows for fast, flexible control design methods for quantum stabilization of pure states and subspaces, which naturally include both Hamiltonian and dissipative control actions. A novel approach to measurement-based, dissipative feedback design is introduced, and extends the applicability of switching techniques with respect to previously proposed ones, as it does not need stringent invariance assumptions, while it still avoids undesired chattering or Zeno effects by modulating the control intensity. When the switching dynamics do leave the target invariant, on the other hand, we show that exponential convergence to the target can be enforced without modulation, and switching times that can be either fixed or stochastic with hysteresis to avoid chattering. The effectiveness of the proposed methods is illustrated via numerical simulations of simple yet paradigmatic examples, demonstrating how switching strategies converge faster than open-loop engineered dissipation.

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