Hidden non-Markovianity in open quantum systems

• URL: http://arxiv.org/abs/2009.10605v1
• Date: Tue, 22 Sep 2020 15:13:38 GMT
• Title: Hidden non-Markovianity in open quantum systems
• Authors: Daniel Burgarth, Paolo Facchi, Marilena Ligab\`o, Davide Lonigro
• Abstract summary: We show that non-Markovian open quantum systems can exhibit exact Markovian dynamics up to an arbitrarily long time. This shows that non-Markovianity is physically undecidable and extremely counterintuitive, since its features can change at any time, without precursors.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We show that non-Markovian open quantum systems can exhibit exact Markovian dynamics up to an arbitrarily long time; the non-Markovianity of such systems is thus perfectly "hidden", i.e. not experimentally detectable by looking at the reduced dynamics alone. This shows that non-Markovianity is physically undecidable and extremely counterintuitive, since its features can change at any time, without precursors. Some interesting examples are discussed.

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