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+ - Do 'time crystals' exhibit perpetual motion?->

ceview writes: So this story on Wired seems to have got lots of people a bit confused. The experimental set up is incredibly delicate (Bose Einstein Condensate) so it implies this perpetual motion effect can't really be used to extract energy. What is your take on it? It can't really upend anything because at a quantum level things behave weirdly at the best of times.

The heavy details are here
http://arxiv.org/abs/1202.2539v2
http://arxiv.org/abs/1202.2537v2

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Do 'time crystals' exhibit perpetual motion?

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