[Cryptography] Quantum computers are thirty years away and will remain thirty years away forever

[jrzx]

5> Yes you can implement a Toffoli gate using other gates. The flaw here seems to be your belief that the CNOT is not a unitary transformation. A CNOT gate's transformation matrix is ((1, 0, 0, 0), (0, 1, 0, 0), (0, 0, 0, 1), (0, 0, 1, 0)), and that's unitary.
>
> > And so far, not one actual Tofoli gate.
> 

> Actually, there have. Go read the literature.

I stand corrected.  Reaching 68% quantum.

This is a long way short of what is needed for error correction, which is generally thought to require 99.9%, but it is possible that error collection may be possible to accomplish with less than 99.9%


















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