
There are strong evidences in the literature that quantum non-Markovianity would hinder the presence of Quantum Darwinism. In this Letter, we study the relation between quantum Darwinism and approximate quantum Markovianity for open quantum systems by exploiting the properties of quantum conditional mutual information. We show that for approximately Markovian quantum processes the conditional mutual information still has the scaling property for Quantum Darwinism. Then two general bounds on the backflow of information are obtained, with which we can show that the presence of Quantum Darwinism restricts the information backflow and the quantum non-Markovianity must be small.
8 pages, typos fixed
Quantum Physics, Non-Markovian processes: hypothesis testing, Open systems, reduced dynamics, master equations, decoherence, Quantum information, communication, networks (quantum-theoretic aspects), FOS: Physical sciences, quantum Darwinism, open quantum systems, Quantum Physics (quant-ph), quantum non-Markovianity, conditional mutual information
Quantum Physics, Non-Markovian processes: hypothesis testing, Open systems, reduced dynamics, master equations, decoherence, Quantum information, communication, networks (quantum-theoretic aspects), FOS: Physical sciences, quantum Darwinism, open quantum systems, Quantum Physics (quant-ph), quantum non-Markovianity, conditional mutual information
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