论文标题
用单个量子信息测量超时订购的相关器的指数加速
Exponential speedup in measuring out-of-time-ordered correlators with a single bit of quantum information
论文作者
论文摘要
超时订购的相关器（OTOC）是量子信息争夺和量子混乱的量词。我们提出了一种有效的量子算法来测量在最知名的经典算法上提供指数加速的OTOC，该算法提供了估计的OTOC操作员，可以承认有效的门分解。我们还讨论了一个方案，以获取有关特征值光谱和OTOC的光谱密度的信息。
Out-of-time-ordered correlators (OTOC) are a quantifier of quantum information scrambling and quantum chaos. We propose an efficient quantum algorithm to measure OTOCs that provides an exponential speed-up over the best known classical algorithm provided the OTOC operator to be estimated admits an efficient gate decomposition. We also discuss a scheme to obtain information about the eigenvalue spectrum and the spectral density of OTOCs.
