Entanglement and quantum coherence have pivotal roles in the recent era of quantum technology. However, these unique quantum features are very fragile to inevitable system-environment interaction and decay very fast. Hence, there has been a long-standing debate on finding the procedures to diminish or ideally wash out such deleterious effects. Over the years, the many different approaches have been developed for this purpose, from quantum feedback control to optimal control theory. At the first part of the talk, we establish our general scheme, referred to as process-based optimal control, to control optimally the destructive effects of environment on the dynamics of an open system. This state-independent framework enables us to reexamine the important problems in quantum technology from a different perspective including gate simulation, system-environment decoupling and indirect environment engineering. At the second part, we introduce some quantum features such as purity and coherence of a quantum dynamics/process. By using these properties, we construct a feature-based approach to increase the purity and coherence of an open system dynamics at a given final time.




Venue: Room D, 3rd Floor, Farmanieh Building, IPM
Link: https://vmeeting2.ipm.ir/b/nan-gkn-wmh-exh