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Gate sequence for continuous variable one-way quantum computation

机译:连续变量单向量子计算的门序列

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摘要

Measurement-based one-way quantum computation using cluster states as resources provides an efficient model to perform computation and information processing of quantum codes. Arbitrary Gaussian quantum computation can be implemented sufficiently by long single-mode and two-mode gate sequences. However, continuous variable gate sequences have not been realized so far due to an absence of cluster states larger than four submodes. Here we present the first continuous variable gate sequence consisting of a single-mode squeezing gate and a two-mode controlled-phase gate based on a six-mode cluster state. The quantum property of this gate sequence is confirmed by the fidelities and the quantum entanglement of two output modes, which depend on both the squeezing and controlled-phase gates. The experiment demonstrates the feasibility of implementing Gaussian quantum computation by means of accessible gate sequences.
机译:使用簇状态作为资源的基于测量的单向量子计算为执行量子代码的计算和信息处理提供了有效的模型。可以通过长的单模和双模门序列充分实现任意高斯量子计算。然而,由于不存在大于四个子模式的簇状态,因此到目前为止尚未实现连续的可变门序列。在这里,我们介绍了基于六模式簇状态的第一连续可变门序列,该序列由单模式挤压门和双模式受控相门组成。该门序列的量子特性由两个输出模式的保真度和量子纠缠度确定,这两个输出模式都取决于挤压和受控相门。实验证明了通过可访问的门序列实现高斯量子计算的可行性。

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