Unconventional quantum gate based on Rydberg blockade mechanism  

作　　者：SUN RongHui YE MingYong LIN XiuMin 

机构地区：[1]Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials,College of Physics and Energy,Fujian Normal University

出　　处：《Science China(Physics,Mechanics & Astronomy)》2013年第9期1755-1759,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.61275215 and 11004033);the Natural Science Foundation of Fujian Province (Grant No.2010J01002);the National Fundamental Research Program of China (Grant No.2011CBA00203)

摘　　要：We propose a scheme for realizing an unconventional three-qubit controlled-phase gate via the Rydberg blockade mechanism.The qubit is encoded by atomic ensembles that are trapped in optical traps and fixed on an atom chip.Because of the collective nature of the encoding and the Rydberg blockade mechanism,the scheme do not require separate addressing of individual atoms.The time needed for the gate operation is much shorter than that in a similar scheme.In addition,we show the gate can be used as a basic tool for effective generation of large-scale 2D cluster states.We propose a scheme for realizing an unconventional three-qubit controlled-phase gate via the Rydberg blockade mechanism.The qubit is encoded by atomic ensembles that are trapped in optical traps and fixed on an atom chip.Because of the collective nature of the encoding and the Rydberg blockade mechanism,the scheme do not require separate addressing of individual atoms.The time needed for the gate operation is much shorter than that in a similar scheme.In addition,we show the gate can be used as a basic tool for effective generation of large-scale 2D cluster states.

关 键 词：Rydberg blockade mechanism controlled-phase gate cluster state 

分 类 号：O413[理学—理论物理]