A two-qubit system in a random many-body environment decoheres with two successive Gaussian decays, which a time-homogeneous Lindblad equation can never reproduce because its short-time decay is always linear.
Completely positive dynamics of correlated neutral kaons
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We study the behaviour of correlated neutral kaons produced in phi-meson decays under the hypothesis that the quantum mechanical time-evolution is completely positive. We show that planned experiments at phi-factories could give precise bounds on the phenomenological parameters of the model.
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A Breakdown Case Study of the Lindblad Approach via Entanglement and Purity
A two-qubit system in a random many-body environment decoheres with two successive Gaussian decays, which a time-homogeneous Lindblad equation can never reproduce because its short-time decay is always linear.