Measurement-Device-Independent Verification of a Quantum Memory
arXiv:2104.14723 · doi:10.1103/PhysRevLett.127.160502
Abstract
In this paper 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 joint Bell-state measurement (BSM). 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.
arXiv comment10 pages, 8 figures
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- Semi-device-independent quantum random number generator with a broadband squeezed state of light
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