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Quantum Darwinism

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Posted by Richard Ruquist on August 29, 2003 15:57:28 UTC

Survival of the fittest quantum states in nature.

The following paper purports to give man a place in nature via quantum darwinism in which selection of the fittest quantum states reduces quantum phenomena to observable (without effecting the state of) classical phenomena.

The author attributes these ideas to Princeton's John Wheeler, further evidence of my suggestion that almost all new ideas come from a very few genius type individuals. In physics, all the recent ones seem to come from Wheeler, who some how thinks of everything before anybody else.

Skip to the Conclusion where it is asserted that redundancy brings tenuous quantum states into objective reality. Seems like a definition of reality to me.


Quantum Darwinism and Envariance
Authors: W. H. Zurek from LANL

Effective classicality of a property of a quantum system can be defined using redundancy of its record in the environment. This allows quantum physics to approximate the situation encountered in the classical world: The information about a classical system can exist independently from its state. In quantum theory this is no longer possible: In an isolated quantum system the state and the information about it are inextricably linked, and any measurement may -- and usually will -- reset that state. However, when the information about the state of a quantum system is spread throughout the environment, it can be treated (almost) as in classical physics.

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