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arXiv 2004.05638math.OCmath-phmath.MPquant-ph
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自旋为1/2的量子系统镇定反馈的鲁棒性

On the robustness of stabilizing feedbacks for quantum spin-1/2 systems

Weichao Liang, Nina H. Amini, Paolo Mason

摘要:

在本文中,我们考虑随机主方程描述的量子自旋1/2系统与电磁场进行连续时间测量的相互作用的演变。我们假设系统的初态和物理参数的精确值是未知的。我们证明了在[16]中考虑的反馈镇定策略对这些缺陷是鲁棒的。这是通过研究描述实际状态和估计的反馈控制器在适当的假设下的演变的耦合随机主方程的渐近行为。给出了保证耦合系统指数镇定的反馈控制器的充分条件和参数估计的有效域。此外,我们的结果使我们能够肯定地回答[15,猜想4.4]的情况下,自旋为1/2的系统与未知的初态,即使在存在不精确的已知的物理参数。

英文摘要:

In this paper, we consider stochastic master equations describing the evolution of quantum spin-1/2 systems interacting with electromagnetic fields undergoing continuous-time measurements. We suppose that the initial states and the exact values of the physical parameters are unknown. We prove that the feedback stabilization strategy considered in [16] is robust to these imperfections. This is shown by studying the asymptotic behavior of the coupled stochastic master equations describing the evolutions of the actual state and the estimated one under appropriate assumptions on the feedback controller. We provide sufficient conditions on the feedback controller and a valid domain of estimated parameters which ensure exponential stabilization of the coupled system. Furthermore, our results allow us to answer positively to [15,Conjecture 4.4] in the case of spin-1/2 systems with unknown initial states, even in presence of imprecisely known physical parameters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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