Recent content by Untangled

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    Status of deBroglie-Bohm pilot wave theory

    It seems clear from Bell's 1986 article "Six possible worlds of quantum mechanics" (reproduced in J.S. Bell, Speakable and Unspeakable in Quantum Mechanics, 2nd ed., 2004) that he considered the pilot wave theory a radical, but also valid and simple potential solution to the wave-particle...
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    FTL communication: might QM entanglement trump relativity?

    FTL communication: might QM entanglement "trump" relativity? As we presently understand entanglement, it can't be used for FTL communication, since some speed-of-light exchage of information between Bob and Alice is required. So c apparently still remains the communication speed limit. But...
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    How do you determine that a particle is/was entangled?

    Thank you all for your answers to my query, which was perhaps naive, but seems to have led to some interesting discussions. What I had in mind was a possible FTL model, where Bob could either measure or not measure his particle, leading, if Alice could determine whether her particle had been...
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    How do you determine that a particle is/was entangled?

    If you encounter a single particle (photon, electron, etc.) in space, can you perform any measurement that will tell you whether that particle was entangled with another particle just prior to the measurement? More generally, can you determine if a particle is entangled if you know nothing about...
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