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 

机构地区：[1]Laboratory of Photonic Information Technology,SIPSE & LQIT,South China Normal University

出　　处：《Chinese Physics B》2010年第3期330-333,共4页中国物理B（英文版）

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)

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.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.

关 键 词：Raman-coupled model quantum computation quantum phase gate 

分 类 号：O431.2[机械工程—光学工程]