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Quantum mechanics

Passage through chaos

A quantum system can undergo tunnelling even without a barrier to tunnel through. The latest experiments visualize this process in exquisite detail, completely reconstructing the state of the evolving system.

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Figure 1: The kicked top.
Figure 2: Chaos in the kicked top.


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Steck, D. Passage through chaos. Nature 461, 736–737 (2009).

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