Micius: entanglement distributed across 1,203 km
Micius distributed entangled photon pairs to two ground stations separated by 1,203 km, with combined satellite-to-ground paths of roughly 1,600–2,400 km.
- Team / system
- QUESS / Micius research team
- Link geometry
- Two satellite-to-ground downlinks
- Platform
- Micius quantum science satellite
- Year / programme
- 2017
01 · SYSTEM
How it was achieved
An entangled-photon source aboard the satellite sent one photon of each pair to each ground station through separate downlinks. Narrow beams, precision tracking and coincidence measurement allowed the two sites to verify non-classical correlations over continental scale.
02 · EVIDENCE
Evidence snapshot
- 01
Ground-station separation: 1,203 km.
- 02
Two satellite downlinks produced a total optical path of approximately 1,600–2,400 km.
- 03
Bell inequality violation reported at 2.37 ± 0.09.
03 · SIGNIFICANCE
Why it matters
The experiment showed that a satellite can bridge the exponential loss that limits direct long-distance quantum distribution through optical fibre.
05 · REFERENCES
Sources & references
The values in this file are traced to the sources below. Record language follows the wording supported by the primary evidence.
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