Quantum communication, internet is useless, deadend, overhyped, No progress.

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Quantum communication is useless

Almost all the fragile quantum information was lost over just 254 km even in 2025, which distance regressed from 404 km in 2016.  ← No progress in quantum communication.

(Fig.1)  Quantum information is too weak to send over long distance (= just 254 km in 2025 ), Not secure at all.

Quantum communication is deadend, useless forever, almost all information was lost over just 254 km, which technology is regressing.

Overhyped media (4/23/2025) says "Scientists could send (fragile) quantum information (= just weak classical light ) over (just) 254 km by conventional or commercial optical fibers."

↑ But other scientists already could send quantum message over 404 km in 2016 (= 9 years ago ), which means quantum communication technology made No progress, rather regressing.

In this new (impractical) quantum communication research, they sent very weak light (or fictional photon ) over 156km + 97km (= just 254km ) with massive photon or information loss.  ← Secrete (or secure ) key rate (= SKR, this-6th-paragraph ) of sending quantum information becomes zero (= all quantum information or photons were lost ) over just 254km ( this-p.7-Fig.5,  this-p.34 ), which is impractical forever.

Using the existing infrastructure fibers for sending the useless fragile quantum information is impossible forever.

Though the media repeatedly exaggerates "this is the first use of the existing infrastructure optical fibers (= Not true )", they had to prepare the "quantum fibers" exclusively for sending the fragile photons or quantum information (= unidirectionally, inconveniently ) in addition to the different practical existing classical optic fibers ( this-p.15-2nd-paragraph ).

↑ So the existing infrastructure (classical) optical fibers still cannot be used for quantum communication (= fragile quantum information is Not allowed to be copied or amplified due to the stupid quantum rule, which is impractical forever, cannot be used with the existing classical internet cable ).

This-middle Poor results (4/26/2025) says
"Designing the network architecture of a quantum network is challenging. The no-cloning theorem might be a reliable safeguard against copies, but it also eliminates the possibility of signal duplication and amplification. The overall effect is that quantum networks are prone to information loss and limited ranges of only a few miles"

Only one photon or weak light out of 20000000 photons barely reached the destination, almost all photons were lost over just 254 km, which is a useless quantum network.

In this overhyped research, the success rate of sending fragile photons or quantum information to the destination was extremely low = only 0.00000022 or 2.20 × 10^-7 bit/pulse (= almost all photons or quantum information was lost over just 254km,  this-p.6-right-2nd-paragraph ).

Only 110 bits (= 110 photons ) per second could be sent, too slow, useless quantum communication.

↑ So they could send only 110 bits (= only 110 photons or lights,  this-p.6-right-2nd-paragraph,  this-p.16-lower ) per second due to massive photon loss, which is too slow to be a practical communication.

 This-7th-paragraph (4/24/2025) says,
"While the data transmission was slow — 110 bits per second "

This-paper-abstract (4/23/2025) says
"over a 254-kilometre commercial telecom network... achieving encryption key distribution at 110 bits per second (= too slow, No progress, rather regressing )"

This-5th-paragraph (2016) says
"could only be sent at very slow data rates of a few hundred bits per second"  ← No progress from 2016.

Too slow, too high error rate, too easily lost = impractical quantum information

Furthermore, even photons or quantum messages reaching the destination contained the impractically high bit error rates of 5 ~ 30% ( this-p.16-error rate ), which can Not be used as secure quantum keys.

↑ Secure quantum key or information is useless, hype, based on the use of very weak photon or light, which is easily broken (= and lost ) by eavesdropper (= finding eavesdroppers by the fragility of too weak light is impractical, and it does Not need quantum mechanics, just weak classical light+ polarizer + photodetector is OK ).

Sending fragile photons or quantum information via satellites is impractical forever.

Distributing the fragile photons or quantum information via satellites is also useless, impractical, because even weak moon light causes irreparable errors masking weak quantum information or weak light.

And the instruments emitting the quantum ley or information must be inconveniently preloaded onto satellites, before launching them (= sending quantum information from the sender on the ground to the receiver is impossible via satellites ), which is completely impractical ( this-p.2-2nd-paragraph ).

↑ Governmetns and corporations should stop wasting money and time in the useless hopeless hyped quantum computers and communication, and should allocate the money to making useful multi-probe atomic force microscopes manipulating atoms to cure diseases.

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