What exactly do you mean by observing a state/ collapsing wave function. What is observing? Is it seeing the particle? Hearing?
Also how cautious do you have to be near a quantum computer so that you don't collapse its wave function?
We know that when many particles are shot through the double slit they make an interference pattern. Also when a single particle passes through double slit it makes an interference pattern, ie one particle passing through two slits at once.
But when we put a particle detector near the slits...