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Quantum objects: are they waves or particles

R. Feynman:. "There was a time when newspapers said that only twelve men understood the theory of relativity. I do not believe that there ever was such a time. ... On the other hand, I think it is safe to say that no one understands quantum mechanics.......Do not keep saying to yourself, if you can

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Quantum objects: are they waves or particles

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    1. Quantum objects: are they waves or particles? Lars-Göran Johansson Filosofiska Institutionen Uppsala Universitet Lars-goran.johansson@filosofi.uu.se

    2. R. Feynman: ”There was a time when newspapers said that only twelve men understood the theory of relativity. I do not believe that there ever was such a time. ... On the other hand, I think it is safe to say that no one understands quantum mechanics.......Do not keep saying to yourself, if you can possibly avoid it, 'but how can it be like that?' because you will get 'down the drain' into a blind alley from which nobody has yet escaped. Nobody knows how it can be like that.” The Character of Physical Law, M.I.T Press, Cambridge, Ma. 1967, p. 129.

    3. M. Gell-Mann (1992) ”All of modern physics is governed by that magnificent and thoroughly confusing dicipline called quantum mechanics invented more than fifty years ago. It has survived all tests. We suppose it is exactly correct. Nobody understands it, but we all know how to use it and how to apply it…: and so we have learned to live with the fact nobody can understand it.” Murray Gell-Mann, quoted in Wolpert: The Unnatural Nature of Science. Faber & Faber, London, 1992, p. 144.

    4. Interpretational problem with QM Wave-particle duality: what is it that really exists independently of our observations? The measurement problem: what is so special with measurements causing collapse of superpositions? Non-local interactions: how should we understand interactions not mediated by any force and taking no time?

    5. Delayed choice experiment

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