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This could be tested if it could be determined whether a neutron would delay its demise if there were not suitable receptors for the energy it must release to do so.
Quote from: Vern on 24/01/2009 14:56:48This could be tested if it could be determined whether a neutron would delay its demise if there were not suitable receptors for the energy it must release to do so.Interesting
Researchers have accomplished teleportation, though not of the “Beam me up, Scotty” variety. Instead, they sent information between two individual atoms of the element ytterbium, which were suspended in separate containers three feet apart. Because the quantum information instantly hops from one atom to the other without ever crossing the space between the two, scientists call the transfer “teleportation”Extract from http://blogs.discovermagazine.com/80beats/2009/01/23/quantum-teleportation-is-a-go/Anyone got any thoughts on this?
And I don't see it as a teleportation, I think it's a symmetry 'defined' by those mysterious rascals, the timeless photons but without our macroscopic arrow of time.Therefore there can't be any 'information' exchanged.
So?Is there anyone here that could give us a definition of that:)
The second is that the state can't be examined without resolving it; the receiver would need to know that the sender has resolved their state before they [the receiver] examined their state, otherwise instead of the sender sending their state to the receiver, the receiver is sending their state to the sender.
Quote from: LeeEThe second is that the state can't be examined without resolving it; the receiver would need to know that the sender has resolved their state before they [the receiver] examined their state, otherwise instead of the sender sending their state to the receiver, the receiver is sending their state to the sender.Interesting; it seems that maybe two way communication might happen if the sender and receiver could synchronize their observations just right.
I can't see how that could work because it would need to be resolved in to two simultaneous states, which is a sort of contradiction in terms. Also, how would you achieve syncronisation between the two parties? You're back to light-speed limits again.
How could you know it's state without observing it?
Maybe why we still communicate at light speed
Does resolving the sender system actually resolve the receiver system, or does it just restrict the possible state of the receiver system so that when it's eventually resolved it can only resolve in to one possible state, dictated by the outcome of resolving the sender system?
What I was wondering about is that it's the act of measuring the state that resolves the state, as I understand it. So although the first system may have been measured, and as a consequence, had it's state resolved, the second system has not yet been resolved and it will not be resolved until measured, at which point it can only resolve in to one possible state because of the entanglement. Thus it is only the possible state for the second system that is conveyed instantly.
I should know. I'm a Swede:
After going through the data several times I still haven't determined how they discover that the two ions are entangled. I guess one would need to study the original paper to fully understand.
The two ions are excited and can decay in two possible ways (two colors). The emitted light for both is sent through beamsplitters, so you don't know which ion gave which photon (two paths). There is one combination of photons and paths where you don't know which ion is in which state, and this uncertainty is the same as saying they are entangled in a superposition of the two.
Superposition is being in two states at once using the description (basis) that you are using to describe your system. It would be like using an XY coordinate system to describe the position of something that is normally only on either axis. But you put the item on the line at 45º and now it's in both states at once. (You could, however, use a different coordinate system to describe that particle: rotate your system by 45º and it's on an axis again).