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Photons caught in the act

Physicists watch a microwave pulse lose its quantum weirdness

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3:31pm, September 24, 2008

Physicists have made the first “movie” of a microwave pulse transitioning from the quantum-physics world to the classical-physics world.

Reporting in the Sept. 25 Nature, the researchers say that their method may help in understanding at what point in nature quantum physics ends and classical physics begins. It could also shed light on how to keep information inside future computers that would take advantage of quantum physics.

Quantum objects — generally, anything that’s small enough to be ruled by quantum physics — can exist in multiple forms at the same time. An atom, for example

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