Fundamental limits of quantum-secure covert optical sensing
Fundamental limits of quantum-secure covert optical sensing
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DOI：
10.1109/isit.2017.8007122
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发表时间：
2017-01
期刊：
影响因子：
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通讯作者：
Boulat A. Bash;C. Gagatsos;A. Datta;S. Guha
中科院分区：
文献类型：
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作者：
Boulat A. Bash;C. Gagatsos;A. Datta;S. Guha
我们提出了一个平方根定律的相位θ的单个像素使用光学探头，通过一个单模有损热噪声玻色子通道的主动传感。具体地说，我们表明，当传感器使用n模式隐蔽光学探头，所得到的估计θn的均方误差（MSE）的尺度为<$（θ-θ <$n）2 <$$>= O（1/<$n），提高缩放必然导致检测的对手具有很高的概率。我们充分描述了这一限制，并表明它是可以实现的使用激光照明和外差接收器，即使当对手捕获的每一个光子，不返回到传感器，并执行任意复杂的测量所允许的量子力学定律。
We present a square root law for active sensing of phase θ of a single pixel using optical probes that pass through a single-mode lossy thermal-noise bosonic channel. Specifically, we show that, when the sensor uses an n-mode covert optical probe, the mean squared error (MSE) of the resulting estimator θn scales as 〈(θ-θ̂n)2〉 = O(1/√n) improving the scaling necessarily leads to detection by the adversary with high probability. We fully characterize this limit and show that it is achievable using laser light illumination and a heterodyne receiver, even when the adversary captures every photon that does not return to the sensor and performs arbitrarily complex measurement as permitted by the laws of quantum mechanics.