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This breakthrough demonstrates a calibration-free method for generating on-demand polarization-entangled photons using single rubidium atoms in an optical cavity, enabling robust quantum state transmission over long distances via standard fiber optics. Such deterministic sources are critical infrastructure advancements that address key scalability challenges for practical quantum communication networks and distributed quantum computing architectures. The collaboration between private hardware developers and defense research entities highlights the accelerating maturation of deployable quantum technologies beyond laboratory settings.

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Quantum Source and Israel’s DDR&D Demonstrate Calibration-Free, Single-Atom Entangled Photon Source

Quantum Computing ReportJuly 18, 20263 min read

Israeli quantum hardware developer Quantum Source Labs, in collaboration with the Israel Directorate of Defense Research & Development (DDR&D / MAFAT), has demonstrated the on-demand generation of polarization-entangled photon pairs in the robust quantum singlet Bell state. Emitted from a single rubidium atom trapped within a microscopic optical cavity, the deterministic photon pairs were transmitted [...] The post Quantum Source and Israel’s DDR&D Demonstrate Calibration-Free, Single-Atom Entangled Photon Source appeared first on Quantum Computing Report.

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