A four-level cavity quantum memory with unwanted couplings shows stable, threshold, and unstable dynamical regimes, with sub-regimes in the stable case and conditions for high-fidelity storage versus amplification in warm-vapor parameters.
Simon, Nature Photonics11, 678 (2017)
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A terrestrial BBM92 QKD demonstration with space-qualified entangled photons over 1.8 km produced 7.56 kbps key rate and 4.78% QBER using identical spectral-spatial filtering to the flight model, confirming ground-space segment compatibility.
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From quantum storage to amplification: the effect of unwanted couplings and an additional level in cavity-based ensemble quantum memories
A four-level cavity quantum memory with unwanted couplings shows stable, threshold, and unstable dynamical regimes, with sub-regimes in the stable case and conditions for high-fidelity storage versus amplification in warm-vapor parameters.
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Terrestrial readiness campaign for space-to-ground quantum communications with a space-qualified entangled photon-pair system
A terrestrial BBM92 QKD demonstration with space-qualified entangled photons over 1.8 km produced 7.56 kbps key rate and 4.78% QBER using identical spectral-spatial filtering to the flight model, confirming ground-space segment compatibility.