Provenance Record

Substantive 976-word News piece on a Light: Science & Applications paper. The technical specifics table (120 km, 75.947 MHz, 1560.6 nm, 1018 ps, g²(0) 0.85%, QBER 6.85% Z / 9.60% X, 0.1956 dB/km, 15 bits/s secure key rate, 74% detector efficiency) is unusually precise — every number traces to the PMC paper or EurekAlert release. Internal cross-reference to the April India National Quantum Mission article verified to exist on disk.

Read all 5 snapshots. source-0 PMC paper (64k chars): all technical specifics verbatim; quoted phrases 'first experimental validation of integrating a QD single-photon source with time-bin encoding in a telecom-band QKD system', 'Telecom-band QDs with Purcell enhancement can provide high-brightness photons suitable for intercity fiber communication...', 'highest secure key rate among the time-bin QKDs based on single-photon sources' all verbatim; full 14-author team listed including Wang/Yang/Zopf/Ding (Hannover), Joos/Jetter/Portalupi/Michler (Stuttgart), Cao/Yin (Nanjing), Shan (Anhui). source-1 EurekAlert (6k chars): 'Telecom-band QDs with Purcell' framing verbatim; Light: Science & Applications attribution confirmed. source-2 SciTechDaily (8.8k chars): 120 km, 127 km maximum, 'six hours', 'unhackable keys' framing. source-3 ScienceDaily (13k chars): 'intrinsic stability against such channel fluctuations' verbatim; 'encrypted text messaging' use case verbatim; six-hour stable run reproduced. source-4 arXiv abstract (5.8k chars): 'first experimental validation' and 'highest secure key rate' both verbatim.

All specifics verified. The article explicitly distinguishes maximum-achievable-distance (127 km, from SciTechDaily) from the operating-point distance (120 km, from the paper) — a careful disambiguation.

APPROVE. Exceptionally rigorous technical reporting with every number sourced. No corrections record needed.