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arXiv quant-ph/0304124quant-ph
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高斯P-函数量子估计中的操作扰动

Disturbance of operation in quantum estimation for the Gaussian P-function

Yoshiyuki Tsuda, Keiji Matsumoto, Masahito Hayashi

摘要:

对于量子高斯态族,Hayashi提出了一种使用分束器来估计P函数的位置和尺度参数的量子力学操作,并证明了它是渐近最优的。本文分析了分束器透明度的随机性所引起的干扰对工作的影响。结果表明,即使随机透明度的方差很小,Hayashi的估计是不适当的,在某种意义上说,他们是有偏的和渐近不一致的。在这种情况下,我们建议停止操作并纠正估计量的偏差。

英文摘要:

For the quantum Gaussian state family, Hayashi proposed a quantum mechanical operation using beam splitters to estimate the location and scale parameters of the P-function, and he showed that it is asymptotically optimal. In this paper, we analyze the effect of disturbance of his operation caused by the randomness of the transparency of the beam splitters. It is shown that even if the variance of the random transparency is small, Hayashi's estimators are improper in a sense that they are biased and asymptotically inconsistent. In such a case, we propose to stop the operation and correct the biases of estimators.

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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