Related to Physics and Wave generator
2006-11-10 21:04:34 · 5 answers · asked by mohul g 1 in Science & Mathematics ➔ Physics
under quantum mechanics...
it's a thought experiment, called the EPR paradox...
this paradox is more severe or seious than schroedinger's cat paradox...
quantum mechanics says that a motion of a particle can be deermined by its wave function, thus the results of an experiment or probabilities or predictions...
but E, P and R thought that this is true only with statistical distributions of the particles tested by the experiment (the properties of particles)...
2006-11-10 21:32:45 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Einstein and Co. dreamed this up as a "proof" that what Einstein called "spooky action at a distance" couldn't occur and so quantum mechanics must be wrong - or at least flawed. It was known that if you measured a property of one of a pair of quantum particles (say its spin) then the other particle would assume the opposite state. The EPR thought experiment supposes those two particles could in principal be on opposite sides of the universe -millions of light years apart and as nothing travels faster than light how can they possibly react instantly ?
But they do. John Bell showed in principal how the EPR could be tested, but it took 20 years for the experimental physicists to turn it into a real experiment. That was done by Alain Aspect in Paris in the early 1980's and proved that quantum entanglement was real and instantaneous no matter how far apart the particles.
2006-11-11 06:19:02 · answer #2 · answered by black sheep 2 · 0⤊ 0⤋
Its a thought experiment intended to expose a paradox at the heart of quantum mechanics. It basically involved creating a system of two particles - say photons - whose quantum states depend on one another (or are entagled). These are then separated by a large distance.
A measurement made on one of the particles then reveals its quantum state. But because the two are entangled, this instantly reveals the state of the other particle. The argument is that this means information must have travelled faster than light, which is forbidden by special relativity.
In fact no such superfast information transfer has happened. The information is only known where the measurement was made (and only because there was additional information that the states were entangled); it can only be communicated to the other particle at the speed of light, and otherwise the state of the other particle can only be known by making a measurement.
In fact the EPR experiment has been carried out and accords precisely with quantum mechanics.
2006-11-11 05:28:24 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Is a mental experiment.
You must to search in Internet by " EPR experiment"
Is about the comunication between two particles with spin
2006-11-11 10:07:41 · answer #4 · answered by Juan D 3 · 0⤊ 0⤋
http://www.bun.kyoto-u.ac.jp/~suchii/Bohr/EPR.html
Dont know about wave generation, yet the paradaox theorem holds itself in credit to their work. Hope it assist you in your curiosity. Adieu!
2006-11-11 05:23:37 · answer #5 · answered by Sid 1 · 0⤊ 0⤋