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Cloning the quantum oscillator

机译:克隆量子振荡器

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摘要

A class of completely positive maps are constructed which perform an approximate cloning of arbitrary states of a multi-mode quantum oscillator. Inside this class we find the optimal maps which do the cloning with greatest accuracy. The cloning errors appear in the characteristic functions of the states as additive Gaussian noise. The construction is extended to multiple clones, and it is shown that the minimal noise has an upper bound as the multiplicity goes to infinity. It is also shown that the construction is closely related to the formalism for linear quantum amplifiers and beamsplitters used in quantum optics. [References: 33]
机译:构造了一类完全正图,它们执行多模量子振荡器的任意状态的近似克隆。在该类中,我们找到了最精确的克隆最佳克隆。克隆错误以加性高斯噪声的形式出现在状态的特征函数中。该结构扩展到多个克隆,并且显示出随着多重性达到无穷大,最小噪声具有上限。还表明,该构造与量子光学中使用的线性量子放大器和分束器的形式主义密切相关。 [参考:33]

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