Recent content by hellsteiger

Seems to me there is some sort of relativity here, that to someone outside of a system, it is seen as being in a pure state, regardless of whether decoherence is occurring within that system for whatever reasons. If this outside observer where to then interact with the system it could be put...

Yeah, thanks, Bill. I had done so already. And reviewing your paper leaves me with the same question. The difference in formalism and application is obvious. As for realistic interpretations, the difference still seems trivial to me, with respect, once again, to what might be called a universal...

Seems like the only difference between superposition and a mixed state is the presence of an observer, that is a mixed state is only a description for use in a classical world. Also, assuming common sense in a theory does not necessarily make it correct. Seems like a bit of a bandaid to me - we...

Hey there PF'ers. I'm looking for a nifty book or site on Quantum logic and Computation. The sort of book like that would cover digital logic - jumps over all the explanations of underlying working and goes straight to logic and computation. I know it's important, but I have done courses in...

That's the thing. Decoherence occurs when an observer interacts with particles. But isn't decoherence occurring all the time between particles. Take the example of a physicist making an experiment and observing the result. He can these pass on that information to anyone else without that person...

Thanks, I guess what I'm getting at is it seems that for something to be observed it requires an entity with intent to do so for it to happen, which seems odd. Then the fact that an observer can pass on information about what they have observed to another individual even though the other they...

Can you explain to me then - I understand that a wavefunction collapses when it is observed, does it also collapse for a particle when it collides with another particle. (I am trying to gauge the concept of observation now).

Let's focus on this question then - Is it accepted that particles have definite properties? If a particle has definite properties but we can not measure them simultaneously because they are non-commuting then how is it possible that a particle may tunnel?

Sorry, yes, quantum tunneling, mixed it up with quantum teleportation.

I'm having difficulty gauging what the accepted interpretation of the quantum nature of matter is. On the one hand I have been taught that properties of a particle are always definite, but due to the quantum nature of existence we cannot measure several properties to 100% accuracy at once. On...

I should point out that ψ1 is actually an odd function, being the derivative of an even function, it is not even as i stated earlier.

Correction: ψ1=Ndψ0/dx

Homework Statement Hello, I need to calculate the expectation value for position and momentum for a wavefunction that fulfills the following relation: ψ0(-x)=ψ0(x)=ψ*0(x) The wave function is normalised. Homework Equations There is also a second wave equation that is orthogonal...