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Decoherence control by quantum decoherence itself
Katarzyna Roszak (Wrocław University of Science and Technology, Charles University), Radim Filip (Palacký University Olomouc), Tomáš Novotný (Charles University)
Résumé : We propose a general approach of protecting a two-level system against decoherence via quantum engineering of non-classical multiple superpositions of coherent states in a non-Markovian reservoir. The scheme surprisingly only uses the system-environment interaction responsible for the decoherence and projective measurements of the two-level system. We demonstrate the method on the example of an excitonic qubit in self-assembled semiconductor quantum dots coupled to the super-Ohmic reservoir of acoustic phonons.