Open AccessDissipative engineering of a tripartite Greenberger–Horne–Zeilinger state for neutral atoms
Author(s) -
Li DongXiao,
Yang Chong,
Shao XiaoQiang
Publication year - 2021
Publication title -
quantum engineering
Language(s) - English
Resource type - Journals
ISSN - 2577-0470
DOI - 10.1002/que2.66
Subject(s) - rydberg formula , greenberger–horne–zeilinger state , dissipative system , rydberg atom , multipartite , physics , spontaneous emission , high fidelity , quantum , quantum mechanics , atomic physics , w state , quantum entanglement , laser , ion , acoustics , ionization
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.