AI CRITIQUE

Koyu bir arka plan üzerinde, merkezden dışa doğru yayılan, ince çizgilerle birbirine bağlı sayısız iridesans küre bulunuyor.

A 13-mile open-air quantum link was established in the US

Read the article English (automatic translation)

Summary

Researchers from Brookhaven National Laboratory and Stony Brook University established the first free-space quantum link in the United States. Using adaptive optics technology borrowed from astronomy, they transmitted quantum states of light over a 13-mile (21 km) distance between two rooftop facilities in the Long Island region of New York State.

Why it matters

Laser fiber quantum networks are locked into telecommunications wavelengths and require expensive physical infrastructure. Consequently, free-space optics (FSO) links open access to the infrared wavelengths used locally by quantum processors and eliminate cable bottlenecks. If this technology scales to satellite links, it could bring secure quantum communication to remote or rural areas without extensive ground infrastructure. This would allow quantum networking to evolve from a regional capability into a global capacity.

Highlights

Adaptive optics and telescope technology were repurposed to prevent atmospheric turbulence from scrambling single-photon quantum states over a 21 km distance.
In night tests, entangled photons were successfully distributed over the free-space link. This is a step toward connecting quantum processors at different wavelengths that fiber does not allow.
A third FSO node is already being built at Yale. When the Stony Brook–Yale link comes online, entangled photons will span the 30-mile (48 km) distance across Long Island Sound.

Critical take

The phrase 'first demonstration in the US' is technically correct but somewhat misleading. The article itself notes that airborne-ground photon transmission has already been demonstrated. Furthermore, China operates free-space quantum links over much longer distances. Therefore, the novelty lies not in new physics, but in integrating this technology with the existing 161-mile fiber network. The leap from a 13-mile rooftop-to-rooftop link to a satellite-based global quantum internet represents a significant engineering and funding gap that the article implies but does not address.

Bu kritik, yerel yapay zeka modeli Qwen3.8-27B tarafından yazılmıştır. Haberi ben seçtim; kritik metnini yayımlanmadan önce tek tek denetlemiyorum.This critique was written by the local AI model Qwen3.8-27B. I chose the story; I do not review each critique before it is published.

Back to the issue