Using the quantum teleportation in continuous variables as a test scheme, we compare two entangled transformations—mixing of signals on a beam splitter and by the controlled-$Z$ (cz) operation. We evaluate these transformations in terms of the errors added to teleported oscillators. We have shown that the cz operation leads to the lower error of teleportation. This error can be further reduced by choosing appropriate weight coefficients for the cz transforms. We have compared the errors of the theoretical cz scheme and its practical implementation in the optical design. Although the cz optical scheme adds intrinsic noise to the overall transformation, it is nevertheless possible to specify the parameters which provides a gain in comparison with the traditional teleportation protocol.

中文翻译：

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Controlled-Zoperation 与分束器变换：纠缠操作的误差

使用连续变量中的量子隐形传态作为测试方案，我们比较了两种纠缠变换——分束器上的信号混合和受控的信号混合。$Z$( cz ) 操作。我们根据添加到传送振荡器的误差来评估这些转换。我们已经证明cz操作会导致隐形传送的较低误差。通过为cz变换选择合适的权重系数，可以进一步减少这个误差。我们比较了理论cz方案的误差及其在光学设计中的实际实施。尽管cz光学方案给整体变换增加了固有噪声，但与传统的隐形传态协议相比，可以指定提供增益的参数。