Non-Markovian discrete qubit dynamics
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The study of open quantum systems is important for fundamental issues of quantum physics as well as for technological applications such as quantum information processing. The interaction of a quantum system with its environment is usually detrimental for the quantum properties of the system and leads to decoherence. However, sometimes a quantum control can lead to a coherent partial exchange of information between the system and the dynamics of the open system might become non-Markovian. In this article, we study experimentally discrete non-Markovian open quantum system dynamics. We implement a local control protocol using linear optics for controlling the information flow between the open system and the environment. We show how the transition from Markovian to non-Markovian dynamics can be controlled using only local operations for the open system.
KeywordsNon-Markovian dynamics Open quantum system Quantum optics Coherent optical effects
This work was supported by the Magnus Ehrnrooth Foundation and Academy of Finland (287750), National Natural Science Foundation of China (61327901, 11274289 and 11325419), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (XDB01030300). C.F.L. and J.P. acknowledge financial support from the EU Collaborative project QuProCS (Grant Agreement 641277).
Conflict of interest
The authors declare that they have no conflict of interest.
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