Quantum Darwinism and Envariance
Quantum Physics
2007-05-23 v1
Abstract
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.
Cite
@article{arxiv.quant-ph/0308163,
title = {Quantum Darwinism and Envariance},
author = {W. H. Zurek},
journal= {arXiv preprint arXiv:quant-ph/0308163},
year = {2007}
}