Dissipative engineering of a tripartite Greenberger–Horne–Zeilinger state for neutral atoms

作者：Dongxiao Li, Chong Yang, Xiao‐Qiang Shao · 发表于：Quantum Engineering · 年份：2021 · DOI：10.1002/que2.66 · 被引用次数：7 · 研究领域：Quantum Information and Cryptography、Cold Atom Physics and Bose-Einstein Condensates、Quantum optics and atomic interactions

The multipartite Greenberger–Horne–Zeilinger (GHZ) states are indispensable elements for various quantum information processing tasks. Here we put forward two deterministic proposals to dissipatively prepare tripartite GHZ states in a neutral atom system. The first scheme utilizes the polychromatic driving fields and the engineered spontaneous emission of Rydberg states to generate a tripartite GHZ state with a high efficiency, which is then optimized by introducing the Gaussian soft control pulse. In the second scenario, we exploit the natural spontaneous emission of the Rydberg states as a resource, thence a steady tripartite GHZ state with fidelity around 98% can be obtained by simultaneously integrating the switching driving of unconventional Rydberg pumping and the Rydberg antiblockade effect.