Eliminating Next-Nearest-Neighbor Interactions in the Preparation of Cluster State  

作　　者：ZHANG Ji-Ying ZHOU Zheng-Wei GUO Guang-Can 张纪英;周正威;郭光灿(Key Laboratory of Quantum Information,University of Science and Technology of China,Chinese Academy of Sciences,Hefei 230026)

机构地区：[1]Key Laboratory of Quantum Information,University of Science and Technology of China,Chinese Academy of Sciences,Hefei 230026

出　　处：《Chinese Physics Letters》2011年第5期16-19,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 60921091 and 10874170;the K.C.Wong Education Foundation,Hong Kong.

摘　　要：By analyzing recent schemes for preparing the chain cluster state,we find that the existence of long-range couplings between qubits will induce a quick decay of the fidelity of the cluster state.We propose some schemes for eliminating the effect of the next-nearest-neighbor interactions in the XY and Ising models by dynamical decoupling method.In our approach,the undesired next-nearest-neighbor interactions are effectively suppressed and the fidelity of the generated cluster state is greatly improved by the pulse operations.

关 键 词：method STATE CLUSTER 

分 类 号：O41[理学—理论物理]