Recent content by Jackson Tan

Okay, I don't have Nielson and Chuang, so I'm not certain what you're talking about, but by conventional notation, it seems that a and b are annihilation operators acting on the system and the environment respectively. If that is so, then the [a,b] = 0 because they act on different Hilbert...

I leave it up to your philosophy to answer that :smile:! It is a postulate of QM that a measurement changes a superposition to a definite eigenstate. Prior to that, it is a superposition of states. What this means in reality, well, is beyond experiments.

Alright, thanks for the input. I'll take a look into them when I have more time on my hands! Cheers, Jackson

Thanks for the reply (and sorry for my late response), but I'm not certain if it answers my question. My understanding of wormholes is that it is simply a metric that connects two different regions of spacetime (it doesn't even state if it's the same universe). The usual wormhole - the...

The collapse of the wavefunction is associated with measurement. If you perform a measurement on the hydrogen atom, you force the wavefunction to collapse into one of the eigenvectors of the measured observables. Before measurement, the atom is in a superposition of all possible states. You get...

Okay, with regards to quantum teleportation, what is being teleported is the state of the entangled quantum particle. That is, if the atom is in a particular configuration (in terms of spin, for example), then quantum teleportation merely transfers this configuration to another atom. In a...

A typical device in (theoretical) time travel is a wormhole, and the usual method of inducing a time shift, i.e. the two mouths at different times, is to subject one mouth to relativistic time dilation. However, I can't see why a relativistic boost will result in a time shift. It seems that...