Optimal discrimination of optical coherent states cannot always be realized by interfering with coherent light, photon counting, and feedback

Optimal discrimination of optical coherent states cannot always be realized by interfering with coherent light, photon counting, and feedback
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光学相干态的最佳辨别并不总是可以通过相干光干涉、光子计数和反馈来实现

DOI:
10.1103/physreva.97.022320
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发表时间:
2018
期刊:
影响因子:
2.9
通讯作者:
T. S. Usuda
T. S. Usuda
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
K. Nakahira;K. Kato;T. S. Usuda

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众所周知,对任意二进制光学相干态的最小误差量子测量可以通过包括与相干参考光干涉、光子计数和反馈控制的接收器来实现。我们表明,对于三元光学相干态,这种接收机并不总是能够实现最小误差测量。找到这样的接收器的最大成功概率的上界的问题可以用公式表示为凸规划问题。我们推导出它的对偶问题,并在数值上找到上界。至少对于三进制相移键控相干态,该界限没有达到最小误差测量的成功概率。
It is well known that a minimum error quantum measurement for arbitrary binary optical coherent states can be realized by a receiver that comprises interfering with a coherent reference light, photon counting, and feedback control. We show that, for ternary optical coherent states, a minimum error measurement cannot always be realized by such a receiver. The problem of finding an upper bound on the maximum success probability of such a receiver can be formulated as a convex programming problem. We derive its dual problem and numerically find the upper bound. At least for ternary phase-shift keyed coherent states, this bound does not reach the success probability of a minimum error measurement.
DOI: 10.1088/1367-2630/14/8/083009
发表时间: 2012-04
影响因子: 3.3
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