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Comment on Oxford scientists achieve teleportation with quantum supercomputer

Think of it like an identical pair of Shrodinger’s Cats. You can’t know if the cat is alive or dead 'til you open the box, but because they’re identical you know that the other box will show the same result as your own.

The lasers don’t transmit information, they transmit quantum randomness. The act of measuring this randomness creates information, and because the photons are entangled this information includes what was received at both ends.

So the photons that carry the information aren’t teleported, but the information itself is because it doesn’t exist until it is observed.

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ReanuKeeves@lemm.ee ⁨4⁩ ⁨weeks⁩ ago
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- knightly@pawb.social ⁨4⁩ ⁨weeks⁩ ago
  It might be counterintuitive, but that’s genuinely how quantum systems work.
  
  The entangled photons are in a state of quantum superposition until they are measured, and that measurement creates information about the state of both photons.
  
  It’s not a process that can be used to transmit information, it’s a process that transmits identical random numbers to two places at once that can’t be intercepted without breaking either their identicalness.
  
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  - ReanuKeeves@lemm.ee ⁨4⁩ ⁨weeks⁩ ago
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    knightly@pawb.social ⁨4⁩ ⁨weeks⁩ ago
    
    “Previous demonstrations of quantum teleportation have focused on transferring quantum states between physically separated systems,” said Dougal Main, from the Department of Physics at the University of Oxford, who led the study.
    
    "In our study, we use quantum teleportation to create interactions between these distant systems. By carefully tailoring these interactions, we can perform logical quantum gates – the fundamental operations of quantum computing – between qubits housed in separate quantum computers.
    
    “This breakthrough enables us to effectively ‘wire together’ distinct quantum processors into a single, fully-connected quantum computer.”
    
    To simplify, they’re not just entangling pairs of photons and sending them out to two systems, but entangling entire qubits that exist on separate systems. This teleports the state of a qubit from one system to another without collapsing its superposition, enabling the quantum equivalent of parallel processing.
    
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