Dissipative preparation of multipartite Greenberger-Horne-Zeilinger states of Rydberg atoms

• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: SPECIAL TOPIC- Quantum computation and quantum simulation
• 页码范围: 76-84
• 页数: 9页
• 语种: 英文
• DOI: 10.1088/1674-1056/abd755

摘要

The multipartite Greenberger-Horne-Zeilinger(GHZ)states play an important role in large-scale quantum informa-tion processing.We utilize the polychromatic driving fields and the engineered spontaneous emissions of Rydberg states to dissipatively drive three-and four-partite neutral atom systems into the steady GHZ states,at the presence of the next-nearest neighbor interaction of excited Rydberg states.Furthermore,the introduction of quantum Lyapunov control can help us optimize the dissipative dynamics of the system so as to shorten the convergence time of the target state,im-prove the robustness against the spontaneous radiations of the excited Rydberg states,and release the limiting condition for the strengths of the polychromatic driving fields.Under the feasible experimental conditions,the fidelities of three-and four-partite GHZ states can be stabilized at 99.24％and 98.76％,respectively.