2017/05/31 by Xiao‐Qiang Shao, X. Q. Shao, D. X. Li +5 · 58 citations
Chemistry · Computer Science · Physics and Astronomy · #Algorithm #Atomic physics #Blockade #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Ground state #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Rydberg atom #Rydberg formula #State (computer science) #W state #quant-ph
paper · pdf · doi:10.1103/physreva.96.012328
published in Physical Review A 96(1) (American Physical Society)
openalex publication_date 2017/07/24 · arxiv created 2017/12/06 · arxiv updated 2017/12/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose a mechanism of ground-state blockade between two N-type Rydberg atoms by virtue of the Rydberg-antiblockade effect and the Raman transition. Inspired by the quantum Zeno effect, the strong Rydberg antiblockade interaction plays a role in frequently measuring one ground state of two, leading to a blockade effect for double occupation of the corresponding quantum state. By encoding the logic qubits into the ground states, we efficiently avoid the spontaneous emission of the excited Rydberg state and maintain the nonlinear Rydberg-Rydberg interaction at the same time. As applications, we discuss in detail the feasibility of preparing two-atom and three-atom entanglement with ground-state blockade in closed and open systems, respectively, which shows that a high fidelity of the entangled state can be obtained with current experimental parameters.