Set Stabilizability of Quantum Systems

We explore set-stabilizability by constrained controls, and both controllability and stabilizability can be regarded as the special case of set-stabilizability. We not only clarify how to define an equilibrium point of Schr$\ddot{o}$dinger Equations, but also establish the necessary and sufficient conditions for stabilizability of quantum systems. Unfortunately, it is revealed that the necessary conditions are quite strict for stabilizability of some concrete quantum systems like nuclear spin systems, and this further justifies the introduction of set-stabilizability notion. It is also exemplified that set-stabilizability can be used for investigating quantum information processing problems including quantum information storage and entangled states generation.

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