Mixing and decoherence to nearest separable states in quantum measurements
Quantum Physics
2007-06-13 v2
Abstract
We illustrate through numerical results a number of features of environment-induced decoherence under a broad class of apparatus-environment interactions in quantum measurements wherein the reduced system-apparatus density matrix evolves towards the nearest separable state and, in addition, there occurs a mixing in relevant groups of apparatus microstates (see below). The resulting final state is unique and correctly embodies the measurement statistics even in the absence of environment-induced superselection because of energy differences between these groups of states. The partial transpose remains non-positive throughout the process.
Cite
@article{arxiv.0705.0733,
title = {Mixing and decoherence to nearest separable states in quantum measurements},
author = {Avijit Lahiri},
journal= {arXiv preprint arXiv:0705.0733},
year = {2007}
}