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Neutrons on classically inexplicable paths - EurekAlert

Can our world be described in a way that ist "macroscopically realistic"? In other words: Do objects (at least large ones) behave the way we would normally expect, having a well-defined state at each moment in time, regardless of whether we are watching them or not? Or is the world really as "weird" as quantum theory leads us to think? To study this, the "Legget-Garg-inequality" was put forward. It has now been experimentally tested by TU Wien (Vienna) and the results are clear: The inequality is violated, "macroscopic realism" is refuted. The world is really as strange as quantum theory tells us.

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