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Attractive Quantum Subsystems and Feedback-Stabilization Problems

Lorenza VIOLA, Francesco Ticozzi
We propose a general theoretical framework that is suitable to study a wide class of stabilization problems for quantum Markovian dynamical systems. Building on system-theoretic ideas, we propose definitions of invariant and attractive quantum subsystem, characterize Markovian invariance properties, and provide sufficient conditions for
attraction. The general framework and results are illustrated by addressing the potential of output-feedback Markovian control strategies for quantum pure state-stabilization. In particular,
constructive results for the synthesis of stabilizing semigroups in arbitrary finite-dimensional Markovian systems are established.
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