Generation of a maximally entangled state using collective optical pumping

2021/07/21 by M. Malinowski, Maciej Malinowski, C. Zhang +15 · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Algorithm #Artificial intelligence #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Excited state #Fidelity #Mathematics #Noise (video) #Physics #Process (computing) #Quantum #Quantum Information and Cryptography #Quantum mechanics #Quantum optics and atomic interactions #Qubit #Scheme (mathematics) #Singlet state #State (computer science) #Telecommunications #physics.atom-ph #quant-ph

paper · pdf · open access · doi:10.1103/physrevlett.128.080503

published in Physical Review Letters 128(8), 080503 (American Physical Society) · 15 pages, 10 figures

arxiv created 2021/07/21 · openalex publication_date 2022/02/22 · arxiv updated 2022/03/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

We propose and implement a novel scheme for dissipatively pumping two qubits into a singlet Bell state. The method relies on a process of collective optical pumping to an excited level, to which all states apart from the singlet are coupled. We apply the method to deterministically entangle two trapped ⁴⁰Ca⁺ ions with a fidelity of 93(1)%. We theoretically analyze the performance and error susceptibility of the scheme and find it to be insensitive to a large class of experimentally relevant noise sources.

Citations

• Demonstrating the viability of universal quantum computation using teleportation and single-qubit operations
• Quantum cryptography based on Bell’s theorem
• An open-system quantum simulator with trapped ions
• Cavity-loss-induced generation of entangled atoms
• The Physical Implementation of Quantum Computation
• On the role of entanglement in quantum-computational speed-up
• Protecting a bosonic qubit with autonomous quantum error correction