Two-Qubit Geometric Gates Based on Ground-State Blockade of Rydberg Atoms  

作　　者：Ji-Ze Xu Li-Na Sun J-F.Wei Y-L.Du Ronghui Luo Lei-Lei Yan M.Feng Shi-Lei Su 徐继泽;孙莉娜;魏金峰;杜艳丽;罗荣辉;闫磊磊;冯芒;苏石磊(School of Physics,Zhengzhou University,Zhengzhou 450001,China;State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Wuhan Institute of Physics and Mathematics,Innovation Academy of Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China;Department of Physics,Zhejiang Normal University,Jinhua 321004,China;Research Center for Quantum Precision Measurement,Guangzhou Institute of Industry Technology,Guangzhou 511458,China)

机构地区：[1]School of Physics,Zhengzhou University,Zhengzhou 450001,China [2]State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Wuhan Institute of Physics and Mathematics,Innovation Academy of Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China [3]Department of Physics,Zhejiang Normal University,Jinhua 321004,China [4]Research Center for Quantum Precision Measurement,Guangzhou Institute of Industry Technology,Guangzhou 511458,China

出　　处：《Chinese Physics Letters》2022年第9期1-5,共5页中国物理快报（英文版）

基　　金：supported by the Special Project for Research and Development in Key Areas of Guangdong Province(Grant No.2020B0303300001);the National Natural Science Foundation of China(Grant Nos.U21A20434 and 12074346);the Natural Science Foundation of Henan Province(Grant No.212300410085)。

摘　　要：We achieve the robust nonadiabatic holonomic two-qubit controlled gate in one step based on the groundstate blockade mechanism between two Rydberg atoms. By using the Rydberg-blockade effect and the Raman transition mechanism, we can produce the blockade effect of double occupation of the corresponding ground state,i.e., ground-state blockade, to encode the computational subspace into the ground state, thus effectively avoiding the spontaneous emission of the excited Rydberg state. On the other hand, the feature of geometric quantum computation independent of the evolutionary details makes the scheme robust to control errors. In this way,the controlled quantum gate constructed by our scheme not only greatly reduces the gate infidelity caused by spontaneous emission but is also robust to control errors.

关 键 词：state RYDBERG quantum 

分 类 号：O413[理学—理论物理] TP38[理学—物理]