Enhancing non-Markovianity by quantum feedback control

Manipulation of non-Markovian dynamics of open quantum systems has become an important topic in the field of quantum information since quantum non-Markovianity has been proved to be a potential quantum resource. Here, focusing on a simple yet well-known model of a two-level system coupled to bosonic fields, we study how to control the non-Markovian dynamics of an open quantum system using quantum-jump-based feedback control. Numerical simulations show that the quantum-jump-based feedback control can be used to enhance the measure of non-Markovianity. We find that the non-Markovianity can further be optimized by choosing appropriate feedback amplitude. These results may trigger potential applications in exploring non-Markovian effect for future quantum technology and quantum memory.

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