High-fidelity universal quantum gates for hybrid systems via the practical photon scattering

作     者：罗竣文 王冠玉 Jun-Wen Luo;Guan-Yu Wang

作者机构：College of Mathematics and PhysicsBeijing University of Chemical TechnologyBeijing 100029China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2023年第32卷第3期

页      面：87-95页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(Grant No.12004029) 

主　　题：quantum computation quantum dot photon microcavity 

摘      要：High-fidelity quantum logic gates are essential in quantum computation,and both photons and electron spins in quantum dots(QDs)have their own unique advantages in implementing quantum *** is of critical significance to achieve high-fidelity quantum gates for photon-QD hybrid ***,we propose two schemes for implementing high-fidelity universal quantum gates including Toffoli gate and Fredkin gate for photon-QD hybrid systems,utilizing the practical scattering of a single photon off a QD-cavity *** computation errors from the imperfections involved in the practical scattering are detected and prevented from arising in the final results of the two ***,the unity fidelity of each quantum gate is obtained in the nearly realistic condition,and the requirement for experimental realization is ***,the quantum circuits for the two gates are compact and no auxiliary qubits are required,which would also be the advantages regarding their experimental *** features indicate that our schemes may be useful in the practical quantum computation tasks.