文章基本信息

标题：Capability comparison of quantum sensors of single or two qubits for a spin chain system ⁎
本地全文：下载
作者：Qi Yu ; Daoyi Dong ; Yuanlong Wang 等
期刊名称：IFAC PapersOnLine
印刷版ISSN：2405-8963
出版年度：2020
卷号：53
期号：2
页码：263-268
DOI：10.1016/j.ifacol.2020.12.133
语种：English
出版社：Elsevier
摘要：AbstractQuantum sensing, utilizing quantum techniques to extract key information of a quantum (or classical) system, is a fundamental area in quantum science and technology. For quantum sensors, a basic capability is to uniquely infer unknown parameters in a system based on measurement data from the sensors. In this paper, we investigate the capability of a class of quantum sensors for a spin-12chain system with unknown parameters. The sensors are composed of qubits which are coupled to the object system and can be initialized and measured. We consider the capability of the single- and two-qubit sensors and show that the capability of single-qubit quantum sensors can be enhanced by adding an extra qubit into the sensor under a certain initialization and measurement setting.
关键词：KeywordsQuantum sensingqubit sensorspin chain system