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quote:Originally posted by ocalhounWell, there is one way.First, a particle is manipulated to produce two identical photons (with identical polarization) these particles are shot off in opposite directions. At one end the photon is tested for polarity. (here's where it gets interesting) according to quantum physics, up until the time the photon was measured, it had all possible polarizations and the test itself colapses the waveform into only one possibility. The interesting part is that which test is used at the one end effects the outcome of any test at the other end, since knowing more about the first photon means some things are impossible to know about the second, as that would violate indeterminacy, a very well proven theory. When the first photon is tested, the waveform collapses for both photons. This happens instantly, no matter what the distance between the photons. Therefore, one could work out a code using these tests that could be deciphered later at the other end.Now dosen't this mean that you will still be limited by the speed of the photons? No. If there is a continuous stream of photons between the center location and the two ends, tests at the first end will efect the second end instantly. This does not truly violate the theory that faster-than light travel is impossible, as nothing actualy travels that distance in that time.I know of only two theories to account for this; action at a distance, and multiple worlds.I prefer the multiple worlds theory because it makes more sense (expecialy with my own thory of a 6 dimensional multiverse). However, the action at a distance theory is more popular because it came first and has not been disproven.
quote:Observations on entangled states naively appear to conflict with the property of Einsteinian relativity that information cannot be transferred faster than the speed of light. Although two entangled systems appear to interact across large spatial separations, no useful information can be transmitted in this way, so causality cannot be violated through entanglement. This occurs for two subtle reasons: (i) quantum mechanical measurements yield probabilistic results, and (ii) the no cloning theorem forbids the statistical inspection of entangled quantum states.Although no information can be transmitted through entanglement alone, it is possible to transmit information using a set of entangled states used in conjunction with a classical information channel. This process is known as quantum teleportation. Despite its name, quantum teleportation cannot be used to transmit information faster than light, because a classical information channel is involved.
quote:Originally posted by thebrain13Could someone tell me what information means in physics?