摘要
提出了一种基于光子-超导量子比特-声子三体复合量子系统相互作用的方案,具体由微波腔和微机械谐振器共同耦合一个超导电荷量子比特构成。基于抽运-探测方法,利用量子朗之万演化方程获得系统一阶线性极化率,研究了超导量子比特耦合微波腔和机械谐振器系统的吸收特性。结果表明,利用双场探测手段,根据信号场的吸收谱中双峰之间的宽度可以精确地测量量子比特与微波腔之间的耦合强度。同时,根据吸收峰和增益峰的位置,实现了振动频率的精确测量。本文提出的测量新方案对精密测量、量子计算以及量子信息处理等领域具有重要的意义。
A scheme based on the interaction of photon-superconducting qubit-phonon three-body hybrid quantum system is proposed,which is specifically composed of a microwave cavity and a micromechanical resonator coupled with a superconducting charge qubit.The probe absorption properties of the superconducting qubit coupled microwave cavity and mechanical resonator system are analyzed in detail through the first-order linear susceptibility which is solved by the quantum Langevin equation.The results show that the dual-field detecting method can accurately measure the coupling strength between the qubit and the microwave cavity according to the width between the double peaks in the absorption spectrum of the signal field.At the same time,according to the positions of the absorption peak and gain peak,accurate measurement of the vibration frequency is achieved.The new measurement scheme proposed in this paper is of great significance to the fields of precision measurement,quantum computing and quantum information processing.
作者
喻富
肖添
何高倩
廖庆洪
Yu Fu;Xiao Tian;He Gaoqian;Liao Qinghong(Department of Electronic Information Engineering,Information Engineering School,Nanchang University,Nanchang,Jiangxi 330031,China;School of Future Technology,Nanchang University,Nanchang,Jiangxi 330031,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2022年第3期286-292,共7页
Laser & Optoelectronics Progress
基金
国家自然科学基金(62061028)
低维量子物理国家重点实验室开放研究基金(KF202010)
南昌大学研究生创新专项(CX2019090)
安徽大学光电信息获取与控制教育重点实验室开放基金(OEIAM202004)。
关键词
量子光学
电路量子电动力学
微机械谐振器
探测场吸收特性
quantum optics
circuit quantum electrodynamics
micromechanical resonator
probe absorption properties
