Decoherence and the transition from quantum to classical -- REVISITED
arXiv:quant-ph/0306072
Abstract
The environment surrounding a quantum system can, in effect, monitor some of the systems observables. As a result, the eigenstates of these observables continuously decohere and can behave like classical states.
An updated version of PHYSICS TODAY, 44:36-44 (1991) article on decoherence. Includes brief updates of many of the modern developments and references