论文标题
高保真挤压门
A high fidelity heralded squeezing gate
论文作者
论文摘要
一个能够挤压任意输入状态的通用挤压门对于连续变量的量子计算〜\ cite {pra79062318，prl112120504}至关重要。但是，在目前的最新技术〜\ cite {pra90060302，prl106240504}中，这种大门的忠诚最终受到创建无界能量的挤压真空模式的需求。在这里，我们通过使用宣传挤压门来规避这一基本限制。我们提出并在实验上证明了一个挤压门，该门可以达到相干输入状态的接近单位保真度。特别是，对于\ si {2.3} {\ db}的目标挤压，我们报告了\ si {98.5} {\％}的保真度。 This result cannot be reproduced by conventional schemes even if the currently best available squeezing of \SI{15}{\dB}~\cite{PRL117110801} is utilised when benchmarked on identical detection inefficiencies.我们的技术可以应用于非高斯州，并为高保真门操作和容忍断层的量子计算提供了有希望的途径。
A universal squeezing gate capable of squeezing arbitrary input states is essential for continuous-variable quantum computation~\cite{PRA79062318,PRL112120504}. However, in present state-of-the-art techniques~\cite{PRA90060302,PRL106240504}, the fidelity of such gates is ultimately limited by the need to create squeezed vacuum modes of unbounded energy. Here we circumvent this fundamental limitation by using a heralded squeezing gate. We propose and experimentally demonstrate a squeezing gate that can achieve near unit fidelity for coherent input states. In particular, for a target squeezing of \SI{2.3}{\dB}, we report a fidelity of \SI{98.5}{\%}. This result cannot be reproduced by conventional schemes even if the currently best available squeezing of \SI{15}{\dB}~\cite{PRL117110801} is utilised when benchmarked on identical detection inefficiencies. Our technique can be applied to non-Gaussian states and provides a promising pathway towards high-fidelity gate operations and fault-tolerant quantum computation.
