One-step implementation of an N-qubit quantum phase gate through a double Raman passage

作     者：吕海燕 於亚飞 张智明 

作者机构：Laboratory of Photonic Information TechnologySIPSE & LQITSouth China Normal University 

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

年 卷 期：2010年第19卷第3期

页      面：330-333页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 60578055 and 60978009) the National Basic Research Program of China(Grant Nos. 2007CB925204 and 2009CB929604) 

主　　题：Raman-coupled model quantum computation quantum phase gate 

摘      要：We propose a scheme for controllably implementing an N-qubit phase gate by one step within a ground-state subspace of N three-state atoms trapped in a cavity through a double Raman passage. We can extend our scheme to the realisation of an arbitrary N-qubit phase gate by appropriately adjusting coupling strengths and detunings between atoms and external driving fields. The advantage of this one-step scheme is its robustness against decoherence.