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Freeman Dyson

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Thirty-one years ago, Dick Feynman told me about his "sum over histories" version of quantum mechanics. "The electron does anything it likes," he said. "It just goes in any direction at any speed, forward or backward in time, however it likes, and then you add up the amplitudes and it gives you the wave-function." I said to him, "You're crazy." But he wasn't.
--
A statement made in 1980, as quoted in Quantum Reality : Beyond the New Physics (1987) by Nick Herbert

 
Freeman Dyson

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