I suspect you aren't all that familiar with quantum mechanics - you seem to think that an object as complex as a brain could have a single quantum state (true)

I suspect you aren't all that familiar with quantum mechanics - you seem to think that an object as complex as a brain could have a single quantum state (true) that cannot be decomposed into many orthogonal localized systems (extremely unlikely). There isn't a theoretical way (yet) to measure and store the whole electrical state either - why bring quantum mechanics into it?