Reduced-state embedding for quantum cryptography published in Newton
June 28, 2026
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1 min read
Image: Kam et al., Newton 2026, CC BY 4.0, background changed to whiteUsing a k-symbol subset of a d-dimensional Hilbert space tailored to the channel’s error structure, reduced-state embedding realizes erasure-type error correction inside the quantum channel and produces a higher secure key rate. We validated the scheme on d = 25 QKD data measured with two multi-plane light converters (shown above) and found the optimum at k = 5.
