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Let's say you have previously agreed with your friend doing the other measurement that if the combination of spins is up, down you go to the cinema and if it is down, up you go eat a pizza. Now you do the measurement and he does, both just before going out of the lab. You now have excluded two possible future states, i.e., not meeting because one went to the ...


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There exists no "spooky action at a distance" except in the mind of the bemused. Correlation is not causation, correlation is not causation, correlation is not causation .... I have read the article about entanglement and EPR paradox. The spin of two particles is measured when they are very far apart, and they always make opposite choices. It seems that ...


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The MWI explains the EPR experiment without invoking any non-local influences. Each observer measures one particle. The measurement affects only the particle being measured and the measurement device. Each measurement device differentiates into two versions, one for each measurement outcome. The correlations are established only after the results are ...


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In this answer we will stick totally to the Copenhagen interpretation of quantum mechanics. Before the system is measured, there is nothing physical (a consequence of realism not playing a part under this interpretation). There is only our mathematical, non-physical description of the possible measurement outcome called the wavefunction. On measurement ...


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Entanglement is the name for that what you want have explained. The entanglement is combining two particles like EPR Experiment. Till now nobody can say how it is possible, only the facts are well known - a new level of understanding of quantum relations is pointed up. A quantum computer is not direct compound with these topics. A quantum computer of ...


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There are a few cases. First case, you measure your particle then you write a letter to your friend and tell your result to your friend before your friend measures their stuff. They can be amazed to know the result of their measurements before they do them. Or they can be unamazed since by then your measurement has had time to affect them without violating ...


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Simple. SR requires that you cannot pass information outside of your light cone. Measuring EPR doesn't let you pass information on in a speed faster than light. If I were to measure, I'd know what measuring the other particle would result in, but I'd now have no way to transfer this information anywhere instantaneously.



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