And here's a quote from Lecture 5 (9/13/2005) of that course, a lecture entitled "Entanglement can facilitate information processing" (a PDF file):
One doesn't need to know much about Dirac notation to grasp the general point being made here, I think. Your claim that
Nature is consistent with quantum mechanics and not with local realism, confirming that for the wavefunction
ψ = α |0〉 + β |1〉nothing can be known about the coefficients α, β until a measurement is made.Entangled pairs of qubits such as
|ψab〉 = (1 ⁄ √2) (|0a1b〉 + |1a0b〉)can be used to facilitate sharing or transmission of information, but not to transmit information from A to B directly. I.e., there is no superluminal transfer of information happening in an entangled state. Why not? Because Alice has no control over the result of her measurement and consequently she cannot control what Bob measures either.
[t]he message is sent and received. Instantaneous communications faster than the speed of light.
is wrong if currently understood physics is right.
Best regards...
All it takes is one experiment (and several millions of dollars).............