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Physics
Quantum Physics
Mach-Zehnder interferometer, but with an entangled beam?
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[QUOTE="Marilyn67, post: 6864999, member: 662333"] Hello, I'm not sure I understood the whole transposition of L.E. Ballentine's problem 9.6, to that of the Mach-Zehnder interferometer but it seems to me that the main thing to remember, (the same thing) is this : The probability density on the screen for the whole ensemble will be : [|ψ1(x)|² + |ψ2(x)|²]/2 which has no interference. I discovered 2 rather interesting things : [B]1/[/B] It seems that a beam of entangled particles carries a message ! This message is "[I]I am entangled[/I]". In other words, trying to create interference by all means without success, with a beam of which we don't know the source would be the signature of an entangled beam, right ? [B]2/[/B] It seems that the beam has lost all its wave properties to retain only its particle properties. This is reminiscent of the double slit experiment where the photons behave like balls when performing measurements in S1 and S2: Impossible to create interference with balls. There it's the same thing. I wonder how a physicist from the beginning of the 20th century (before the birth of quantum mechanics, of course) would have reacted if given a sealed box with such a beam coming out ? He would have discovered a really very special light, capable of producing photosynthesis, photoelectric effects, captured by the retina, releasing energy by being absorbed, reflected, diffracted in the same way in media of index n, and yet, impossible to produce interference with this beam...! I wonder what his conclusions would have been on that laser beam ! What might his conclusions have been in your opinion ? Cordially, Marilyn [/QUOTE]
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Physics
Quantum Physics
Mach-Zehnder interferometer, but with an entangled beam?
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