Minimum Inaccuracy for Traversal-Time

势垒的部分和完全隧穿过程

Partial and full tunneling processes across potential barriers

本文提出部分与完全隧穿过程的概念，利用到达时间算子理论分析量子粒子穿越势垒，指出完全隧穿瞬时完成而部分隧穿耗时非零，从而解释了文献中非零与零隧穿时间的矛盾。

Time as an Observable

The role of time in quantum mechanics is discussed. The differences between ordinary observables and an observable which corresponds to the time of an event is examined. In particular, the time-of-arrival of a particle to a fixed location is not an ordinary quantum mechanical observable. While we can measure if the particle arrives, we argue that the time at which it arrives always has an inherent ambiguity. The minimum inaccuracy of time-of-arrival measurements is given by dt>1/E where E is the kinetic energy of the particle. The use of time-of-arrival operators, as well as current operators,…

通过泊松分布相位随机化的本征路径遍历

Eigenpath traversal by Poisson-distributed phase randomisation

提出一种基于量子Zeno效应的量子计算框架，通过泊松过程随机化退相位操作追踪本征空间，推导保真度微分方程并给出算法时间复杂度界限，在Grover问题和量子线性系统问题上达到最优缩放。