论文标题
量子动力学的通用压缩表征
Universal compressive characterization of quantum dynamics
论文作者
论文摘要
最近的量子技术利用了控制量子系统动力学的复杂多维过程。我们开发了一种自适应对角线 - 元素 - 探针压缩技术，与常规方法相比，使用较少的测量结果可行地表征所有未知的量子过程。该技术利用可推广到任意数量子系统的压缩投影测量值。统一门的数值分析和实验结果都表明$ O（d^2）$的测量成本较低，$ d $二维系统以及针对统计噪声的鲁棒性。我们的工作可能为通用量子设备的可靠且高度压缩的表征铺平了道路。
Recent quantum technologies utilize complex multidimensional processes that govern the dynamics of quantum systems. We develop an adaptive diagonal-element-probing compression technique that feasibly characterizes any unknown quantum processes using much fewer measurements compared to conventional methods. This technique utilizes compressive projective measurements that are generalizable to arbitrary number of subsystems. Both numerical analysis and experimental results with unitary gates demonstrate low measurement costs, of order $O(d^2)$ for $d$-dimensional systems, and robustness against statistical noise. Our work potentially paves the way for a reliable and highly compressive characterization of general quantum devices.
