Quantum network is hopeless, still unable to send fragile information over 25km.

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QuTech sending weak light over only 15 ~ 25 km between Dutch cities with high error rate is far from practical quantum network.

(Fig.1)  Still sending weak light (= entangled photons ? ) over only 15km with 43% error rate is a completely useless and hopeless quantum internet despite longtime researches.

No progress in distance over which fragile quantum information can be sent.  ← Quantum network is deadend, impractical forever.

The 1st paragraphs of this hyped news (11/3/2024) say

"towards a future quantum internet (= still unrealized ).... with deployed optical internet fiber, enabling a 25 km quantum link."  ← Just 25km short link is far from a practical quantum internet.

This research paper p.2 shows weak light (= fictitious photons ) was emitted from either of two nitrogen-vacancy centers in diamond excited by light in Delft or Hague over only 10km ~ 15km (= too short distance to be a practical internet ) toward the light detectors in the middle point between them.

This p.27-lower shows the measured error rate of this still-impractical quantum network was 43.2 ~ 46.6%.  ← Too high error rates to send precise information

↑ Despite extremely-longtime quantum network research, physicists could send (weak) light over only 10 ~ 15km (= No progress ) with impractically-high error rate.

Quantum network, internet, communication are impossible forever due to severe loss of fragile photons (= constant significant loss of quantum information ).

 

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