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

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2011,（5）
• 页码范围: 16-19
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/28/5/050301

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.