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Open Quantum Systems Decoherence
An Argument for Strong Positivity of the Decoherence Functional
arXiv
Authors: Fay Dowker, Henry Wilkes
Year
2020
Paper ID
19360
Status
Preprint
Abstract Read
~2 min
Abstract Words
88
Citations
N/A
Abstract
We give an argument for strong positivity of the decoherence functional as the correct, physical positivity condition in formulations of quantum theory based fundamentally on the path integral. We extend to infinite systems work by Boes and Navascues that shows that the set of strongly positive quantum systems is maximal amongst sets of systems that are closed under tensor product composition. We show further that the set of strongly positive quantum systems is the unique set that is maximal amongst sets that are closed under tensor product composition.
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- We give an argument for strong positivity of the decoherence functional as the correct, physical positivity condition in formulations of quantum theory based fundamentally on...
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