Quantum Entangled Communicators

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acgetchell acgetchell's picture
Quantum Entangled Communicators

You almost got this one right, but made the same error as Charles Stross.

Quantum farcasters are described correctly: you need a classical communications channel for them to work. In essence, when one pair of a qubit is collapsed to a particular value, it is collapsed with respect to a measurement basis.

Although this wavefunction collapse is "instantaneous", you cannot extract the information from the channel until you know the measurement basis. And that must be communicated classically. Mathwise, it's a lot briefer:

Signal = A {|00> + |11>}

where { } normalizes the two entangled wavefunctions, |00> and |11>, and A is the operation (measurement performed).

In order to reconstruct the signal, you have to transmit the measurement {A} used, that operation then gives you the basis (either |00> or |11>.

So, if you take the FTL moniker from quantum entangled communicators, it would be correct.

Slith Slith's picture


Tearlach Tearlach's picture
Basically, he is saying that

Basically, he is saying that EPs instant communication does not work.