金刚石氮-空位色心单电子自旋的电场驱动相干控制  

Coherent electrical control of single electron spin in diamond nitrogen-vacancy center

作　　者：吴建冬 程智 叶翔宇 李兆凯 王鹏飞 田长麟 陈宏伟[2] Wu Jian-Dong;Cheng Zhi;Ye Xiang-Yu;Li Zhao-Kai;Wang Peng-Fei;Tian Chang-Lin;Chen Hong-Wei(Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China;High Magnetic Field Laboratory,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China;The First Affiliated Hospital of USTC,Hefei 230001,China;Division of Life Sciences and Medicine,University of Science and Technolgy of China,Hefei 230026,China)

机构地区：[1]安徽大学物质科学与信息技术研究院,合肥230601 [2]中国科学院合肥物质科学研究院,强磁场科学中心,合肥230031 [3]中国科学技术大学物理学院,合肥230026 [4]中国科学技术大学附属第一医院,合肥230001 [5]中国科学技术大学生命科学与医学部,合肥230026

出　　处：《物理学报》2022年第11期326-332,共7页Acta Physica Sinica

基　　金：中国科学院合肥大科学中心重点研发项目(批准号:2021HSC-KPRD003);国家自然科学基金(批准号:92165108)资助的课题。

摘　　要：金刚石氮-空位(nitrogen-vacancy,NV)色心量子体系因在室温条件下具有可实现单自旋寻址与操控、长量子相干时间等独特优势,在固态量子计算、量子精密测量等领域展现了巨大的应用潜力,其中单自旋的精确操控技术对于NV色心应用的发展尤为关键.NV色心量子体系中常用的自旋操控方法都是通过共振的交变磁场来驱动和操控NV色心电子自旋.本文开展了利用交变电场对NV色心电子自旋进行调控的技术研究.通过电极所产生的交变电场成功驱动了NV色心自旋在|m_(s)=−1>与|m_(s)=+1>两个Δm_(s)=±2的磁禁戒能级间的跃迁,并观测到受控自旋在相关能级的布居度周期性变化而展现出的Rabi振荡现象.进一步的研究表明,电场驱动Rabi振荡的频率受驱动电场功率的调控,与驱动电场的共振频率无直接关系.将自旋电控制技术与磁控制技术方法相结合,能够实现对NV色心3个自旋能级间直接跃迁的全操控.自旋电控制技术的发展将进一步推动NV色心量子体系在量子模拟、量子计算、电磁场的精密测量等领域研究和应用的发展.The nitrogen-vacancy(NV)color center quantum system in diamond has shown great application potential in the fields of solid-state quantum computing and quantum precision measurement because of its unique advantages such as single-spin addressing and manipulation and long quantum coherence time at room temperature.The precise manipulation technology of single spin is particularly important for the development of the application of NV center.The common spin manipulation methods used in NV center quantum system are to drive and manipulate the electron spin by resonant alternating magnetic field.In recent years,the electrical control of quantum spin has attracted extensive attention.In this paper,using the alternating electric field to control the electron spin of NV center is studied.The alternating electric field generated by the electrode successfully drives the Rabi oscillation of the NV center spin between theΔm_(s)=±2 magnetic-dipole forbidden energy levels of|m_(s)=−1>and|m_(s)=+1>.Further studies show that the frequency of the electrically driven Rabi oscillation is controlled by the power of the driven electric field but independent of the resonant frequency of the electric field.The combination of spin electric control and magnetic control technology can realize the full manipulation of the direct transition among the three spin energy levels of NV center,thus promoting the development of the researches and applications of NV quantum system in the fields of quantum simulation,quantum computing,precision measurement of electromagnetic field,etc.

关 键 词：量子相干控制 氮-空位色心 金刚石 电场 

分 类 号：O469[理学—凝聚态物理]