论文标题
时间序列的量子持续同源
Quantum Persistent Homology for Time Series
论文作者
论文摘要
持续性同源性是用于数据分析的强大数学工具,通过在不同尺度的变化中跟踪拓扑特征来总结数据的形状。持续同源性的经典算法通常受到运行时间和内存需求的约束,这些算法和内存要求在数据点数上成倍增长。为了解决这个问题,已经基于两种不同的方法开发了两种持续同源性的量子算法。但是,这两种量子算法都考虑了点云形式的数据集,考虑到许多数据集以时间序列的形式出现,这可以限制。在本文中,我们通过建立量子塔克斯的延迟嵌入算法来减轻此问题,该算法将时间序列变成一个点云,通过考虑将相关的嵌入到更高的维空间中。将时间序列的量子转换为点云,然后可以使用量子持续的同源算法从与原始时间序列相关的点云中提取拓扑特征。
Persistent homology, a powerful mathematical tool for data analysis, summarizes the shape of data through tracking topological features across changes in different scales. Classical algorithms for persistent homology are often constrained by running times and memory requirements that grow exponentially on the number of data points. To surpass this problem, two quantum algorithms of persistent homology have been developed based on two different approaches. However, both of these quantum algorithms consider a data set in the form of a point cloud, which can be restrictive considering that many data sets come in the form of time series. In this paper, we alleviate this issue by establishing a quantum Takens's delay embedding algorithm, which turns a time series into a point cloud by considering a pertinent embedding into a higher dimensional space. Having this quantum transformation of time series to point clouds, then one may use a quantum persistent homology algorithm to extract the topological features from the point cloud associated with the original times series.