Re:Entangled Photons Maintained Under New York Streets
by rdtsc on Wednesday August 14, 2024 @01:08PM
(#41248263)
Easy-peasy. They will periodically see if the photons, when measured had already been measured by an eavesdropper. In quantum world measurement will affect the entangled system, so it’s impossible for someone to measure (read) the data in between without it being detected at both ends.
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Re:Entangled Photons Maintained Under New York Streets
by renox on Friday August 16, 2024 @08:09AM
(#41265585)
> so it’s impossible for someone to measure (read) the data in between without it being detected at both ends.
You give too little information for this to be understandable.
Re:Entangled Photons Maintained Under New York Streets
by rdtsc on Friday August 16, 2024 @12:13PM
(#41267677)
That's one of the fundamentals of quantum mechanics. How that works on the intuitive level, is still being debated. Most of all the mathematics and the experimental results support that with an extremely high level confidence.
Not sure if a HN comment is a right to go back to the fundamental here, either, I'll try to re-iterate it again: reading the quantum information means to "measure it". Measurement alters the state of the system. If someone then "measures" it (i.e. "reads", i.e "eavesdrops"), the communicating parties will find out.