巴西圣保罗大学Luis F. Santos团队研究了耦合到光学腔的双量子点的等待时间统计。相关论文于2025年4月9日发表在《物理评论A》杂志上。

耦合到光学腔的双量子点是非平凡开放量子系统的典型例子。最近的实验和理论研究表明，该系统是微波领域单光子探测的候选者。这激发了超越平均电流的研究，同时也考虑了光子和电子探测的完整计数统计。

考虑到这一点，研究组详细分析了量子跳跃解开过程中该系统的等待时间统计数据，这使他们能够提取成功和失败概率以及相互检测时间的分析表达式。此外，通过比较单光子和多光子场景，他们推断出不同事件的发生概率层次，突出了光子干扰事件在检测概率中的作用。因此，该研究结果直接说明了等待时间统计如何用于优化及时和相关的计量任务。

附：英文原文

Title: Waiting time statistics for a double quantum dot coupled to an optical cavity

Author: Luis F. Santos, Gabriel T. Landi

Issue&Volume: 2025/04/09

Abstract: A double quantum dot coupled to an optical cavity is a prototypical example of a nontrivial open quantum system. Recent experimental and theoretical studies show that this system is a candidate for single-photon detection in the microwave domain. This motivates studies that go beyond just the average current, and also take into account the full counting statistics of photon and electron detections. With this in mind, here we provide a detailed analysis of the waiting time statistics of this system within the quantum jump unraveling, which allows us to extract analytical expressions for the success and failure probabilities, as well as for the interdetection times. Furthermore, by comparing single- and multiphoton scenarios, we infer a hierarchy of occurrence probabilities for the different events, highlighting the role of photon interference events in the detection probabilities. Our results therefore provide a direct illustration of how waiting time statistics can be used to optimize a timely and relevant metrological task.

DOI: 10.1103/PhysRevA.111.042415

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.111.042415