3 ms·
>whatever happens to logic in a qubit? if both A and B are anything between 0 and 1, what's the negation of such a thing? The problem is the pop sci explanatio
by tux3 3y ago
>whatever happens to logic in a qubit? if both A and B are anything between 0 and 1, what's the negation of such a thing?
The problem is the pop sci explanation where qbits are everything between 0 and 1 at the same time is super wrong and misleading.
Your qbits are in states that have "amplitudes". You do things that change the amplitudes, and that happens to do computation. From the amplitudes of your qbits, you can figure out what the probabilities of observing different outcomes is.
It's not that the qbit is anything between 0 and 1. It's in a precise state, that results in percentage probabilities for different outcomes.
The negation of true 80% of the time is false 80% of the time.
- firtoz 3y agoTo be fair, in some quantum computers, it does work. For example if you count a beam of photons following the same path with (almost) all possible polarization combinations as a qubit, that is indeed closer to "everything between", however it's got limited utility indeed when compared to the broader view.