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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:08090074  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Decoherence and the (non)emergence of classicality.
Speaker(s): Steve Weinstein
Abstract: It is widely believed that the dynamical mechanism of decoherence plays a key role in understanding the emergence of classicality from quantum systems, via the environment-induced superselection of a preferred set of subsystem states, the density matrices for which are approximately diagonal in the pointer basis. In this talk, I prove that the vast majority of subsystems do *not* exhibit this behavior, regardless of the Hamiltonian. This shows that the emergence of classicality is highly state-dependent (as suggested by related work of Hartle and others).
Date: 29/09/2008 - 3:00 pm
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