Highly Efficient Coherent Optical Memory Based on Electromagnetically Induced Transparency

2016/05/31 by Ya-Fen Hsiao, Pin-Ju Tsai, Hung-Shiue Chen +9 · 259 citations
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Electromagnetically induced transparency #Encoding (memory) #Optics #Optoelectronics #Photon #Photonics #Physics #Quantum #Quantum Information and Cryptography #Quantum channel #Quantum entanglement #Quantum information #Quantum information science #Quantum mechanics #Quantum optics and atomic interactions #Repeater (horology) #quant-ph

paper · pdf · doi:10.1103/physrevlett.120.183602

published in Physical Review Letters 120(18), 183602 (American Physical Society) · 5 pages, 5 figures, supplementary materials: 12 pages, 4 figures

arxiv created 2018/03/20 · openalex publication_date 2018/05/04 · arxiv updated 2018/05/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

Quantum memory is an important component in the long-distance quantum communication based on the quantum repeater protocol. To outperform the direct transmission of photons with quantum repeaters, it is crucial to develop quantum memories with high fidelity, high efficiency and a long storage time. Here, we achieve a storage efficiency of 92.0 (1.5)% for a coherent optical memory based on the electromagnetically induced transparency scheme in optically dense cold atomic media. We also obtain a useful time-bandwidth product of 1200, considering only storage where the retrieval efficiency remains above 50%. Both are the best record to date in all kinds of schemes for the realization of optical memory. Our work significantly advances the pursuit of a high-performance optical memory and should have important applications in quantum information science.

Citations

• Ultraslow Propagation of Matched Pulses by Four-Wave Mixing in an Atomic Vapor
• Dark-State Polaritons in Electromagnetically Induced Transparency
• Single-Photon-Level Quantum Memory at Room Temperature
• Photon storage inΛ-type optically dense atomic media. II. Free-space model
• A millisecond quantum memory for scalable quantum networks
• Long-distance quantum communication with atomic ensembles and linear optics
• Highly-efficient quantum memory for polarization qubits in a spatially-multiplexed cold atomic ensemble

Cited by

• A Universal All-Fiber Quantum Buffer for the Telecom Band
• Waiting time in quantum repeaters with probabilistic entanglement swapping
• Low-loss high-fidelity frequency beam splitter with tunable split ratio based on electromagnetically induced transparency
• A weakly-interacting many-body system of Rydberg polaritons based on electromagnetically induced transparency
• Coherent storage and manipulation of broadband photons via dynamically controlled Autler–Townes splitting