Measurement-Device-Independent Verification of a Quantum Memory

2021/04/30 by Yong Yu, Peng-Fei Sun, Yu-Zhe Zhang +13
Computer Science · Physics and Astronomy · #Atomic physics #Electromagnetically induced transparency #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Quantum memory #Quantum network #Quantum optics and atomic interactions #Quantum sensor #Quantum state #Rydberg formula #physics.optics #quant-ph

paper · pdf · doi:10.1103/physrevlett.127.160502

10 pages, 8 figures

arxiv created 2021/04/30 · openalex publication_date 2021/10/14 · arxiv updated 2021/10/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

In this Letter we report an experiment that verifies an atomic-ensemble quantum memory via a measurement-device-independent scheme. A single photon generated via Rydberg blockade in one atomic ensemble is stored in another atomic ensemble via electromagnetically induced transparency. After storage for a long duration, this photon is retrieved and interfered with a second photon to perform a joint Bell-state measurement (BSM). The quantum state for each photon is chosen based on a quantum random number generator, respectively, in each run. By evaluating correlations between the random states and BSM results, we certify that our memory is genuinely entanglement preserving.

Citations

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