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Abstract: We develop a general approach for monitoring and controlling evolution ofopen quantum systems. In contrast to the master equations describing timeevolution of density operators, here, we formulate a dynamical equation for theevolution of the process matrix acting on a system. This equation is applicableto non-Markovian and-or strong coupling regimes. We propose two distinctapplications for this dynamical equation. We first demonstrate identificationof quantum Hamiltonians generating dynamics of closed or open systems viaperforming process tomography. In particular, we argue how one can efficientlyestimate certain classes of sparse Hamiltonians by performing partialtomography schemes. In addition, we introduce a novel optimal control theoreticsetting for manipulating quantum dynamics of Hamiltonian systems, specificallyfor the task of decoherence suppression.



Autor: M. Mohseni, A. T. Rezakhani

Fuente: https://arxiv.org/







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