基于低Q腔的无集体弛豫量子信息处理  

A research on quantum information processing in collective-relaxation-free subspace withlow-Q cavity

作　　者：刘阿鹏 郭奇 LIU A-peng;GUO Qi(Department of Fundamental Courses,Shanxi Institute of Technology,Yangquan 045000,Shanxi,China;College of Physics and Electronics Engineering,Shanxi University,Taiyuan 030006,Shanxi,China)

机构地区：[1]山西工程技术学院基础课教学部,山西阳泉045000 [2]山西大学物理电子工程学院,山西太原030006

出　　处：《云南大学学报（自然科学版）》2022年第4期736-743,共8页Journal of Yunnan University(Natural Sciences Edition)

基　　金：山西省高等学校科技创新项目(2019L0988,2019L0043);山西省自然科学基金(201901D211167);山西工程技术学院科研项目(2020008)。

摘　　要：研究了原子囚禁于光学腔系统在低Q腔条件下的输入输出过程,将2个原子编码为在集体弛豫无消相干子空间(Collective-relaxation Decoherence-free Subspaces,CRDFS)内的逻辑量子比特,提出了2种构建光子和逻辑量子比特之间的杂化受控相位翻转门(Hybrid Controlled-phase-flip(CPF)Gate)的理论方案.基于此CPF门,说明可以实现在CRDFS内逻辑量子比特的纠缠态制备.该方案只需要低Q腔和中度耦合条件,这比之前的方案实验上更容易实现.We investigated the input–output process with two atoms trapped in an opticalcavity.We demonstrated a photon–logical-qubit hybrid controlled phase flip(CPF)gate in collective-relaxation decoherencefree subspaces(CRDFS)with the input–output process,CRDFS encoding makes our schemes immune to collective relaxation.Based on the CPF gate,efficient scheme of entanglement generation in CRDFS is proposed.Our schemes merely need low-Q and mediate coupling for the physicalsystems,which makes the schemes easier to be identified compared with previous schemes.

关 键 词：量子信息处理 腔量子电动力学 无弛豫子空间 受控相位翻转门 

分 类 号：O43[机械工程—光学工程]