Do It Yourself Quantum Eraser
Posted Mon Apr 30, 2007, 6:00 AM ET
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Scientific American tells you how to construct a quantum eraser at home—a devise that proves that actions in the present can change our basic interpretation of what happened in past events.
But, gosh darn it, traditional "light is a wave" physics could also explain the results with no quantum mechanics involved. But that would make the universe a much less weird place, so I won't worry about it.
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