论文标题
关于秘密量子传感和纠缠的好处
On Covert Quantum Sensing and the Benefits of Entanglement
论文作者
论文摘要
通过应用于掩盖量子雷达的应用，我们分析了一个秘密的量子感应问题，其中合法用户的目的是通过探测量子通道来估算未知参数，同时可以通过另一个量子通道接收探测信号的对手。当通道是经典的量子时，我们表征了在秘密性限制下的最佳误差指数，以传达探测信号不取决于过去的观察值的传感策略。当合法用户的频道取决于未知参数时，我们提供可实现的性能和相反的结果，以显示人们如何使用纠缠的输入状态显着提高掩盖度。
Motivated by applications to covert quantum radar, we analyze a covert quantum sensing problem, in which a legitimate user aims at estimating an unknown parameter taking finitely many values by probing a quantum channel while remaining undetectable from an adversary receiving the probing signals through another quantum channel. When channels are classical-quantum, we characterize the optimal error exponent under a covertness constraint for sensing strategies in which probing signals do not depend on past observations. When the legitimate user's channel is a unitary depending on the unknown parameter, we provide achievability and converse results that show how one can significantly improve covertness using an entangled input state.
