Interpolating between positive, Schwarz, and completely positive evolution for d-level systems
Dariusz Chruscinski, Farrukh Mukhamedov
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Source: Crossref
Published: Oct 28, 2026
DOI: 10.1088/1751-8121/aebaca
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Abstract We study a class of quantum dynamical maps for d-level systems that interpolate between positive, Schwarz, and completely positive evolutions. Our approach is based on a geometric analysis of the parameter space, which reveals the structure of the regions corresponding to different positivity classes and their boundaries. We show that dynamical trajectories naturally move across these regions, providing a clear geometric interpretation of the transitions between Markovian and non-Markovian regimes. It is shown that within the presented class the evolution eventually becomes entanglement breaking. This analysis highlights the role of divisibility and non-Markovian evolution.
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