“This is where Einstein’s ‘spooky action at a distance comes in. You could measure the spin of that left-going photon a meter or a mile or a light-year from where it was created. At the moment you make the measurement, you can conclude what the spin direction of the other photo must be—two meters or two miles or two light-years away. Establishing with certainty the spin direction of one photon determines the spin direction of the other photon at the instant, even though, up until the measurement is made, the spin directions of both photons are uncertain and unknown. All of this because the two photons, until the moment of measurement, constitute a single quantum system, not two separate quantum systems.” --Kenneth W. Ford, 101 QUANTUM QUESTIONS
Posted on: Sat, 13 Sep 2014 18:31:35 +0000
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