单量子比特退相干时间尺度的实时自适应估计
量子物理
2024-02-22 v4
摘要
表征量子相干性存续的时间,对于任何量子比特、量子存储与量子传感器的实现都至关重要。确定量子系统退相干率的通常方法是一系列探测该参数整个预期范围的实验,并在后处理中提取所得估计。在此,我们提出一种基于简单解析更新规则的自适应多参数贝叶斯方法,利用先前实验获得的信息,实时估计量子系统的关键退相干时间尺度(、 和 )及相应衰减指数。与标准的曲线拟合协议相比,根据具体实验不同,该方法将达到给定不确定性所需的时间最多减少一个数量级。若以灵敏度而非方差进行优化,还可实现约 2 倍的进一步加速。
引用
@article{arxiv.2210.06103,
title = {Real-time adaptive estimation of decoherence timescales for a single qubit},
author = {Muhammad Junaid Arshad and Christiaan Bekker and Ben Haylock and Krzysztof Skrzypczak and Daniel White and Benjamin Griffiths and Joe Gore and Gavin W. Morley and Patrick Salter and Jason Smith and Inbar Zohar and Amit Finkler and Yoann Altmann and Erik M. Gauger and Cristian Bonato},
journal= {arXiv preprint arXiv:2210.06103},
year = {2024}
}
备注
made a change of word in the title ("Online" to "Real-time") and rearranged figures and text to improve the readability of the manuscript