Stabilization of stochastic quantum dynamics via open-and closed-loop control

Francesco Ticozzi, Kazunori Nishio, Claudio Altafini

    Research output: Contribution to journalArticlepeer-review

    22 Citations (Scopus)


    In this paper, we investigate parametrization-free solutions of the problem of quantum pure state preparation and subspace stabilization by means of Hamiltonian control, continuous measurement, and quantum feedback, in the presence of a Markovian environment. In particular, we show that whenever suitable dissipative effects are induced either by the unmonitored environment, or by non-Hermitian measurements, there is no need for feedback, as open-loop time-invariant control is sufficient to achieve stabilization of the target set in probability. Constructive necessary and sufficient conditions on the form of the control Hamiltonian can be provided in this case. When time-invariant control is not sufficient, state stabilization can be attained by the addition of filtering-based feedback control.

    Original languageEnglish
    Article number6228517
    Pages (from-to)74-85
    Number of pages12
    JournalIEEE Transactions on Automatic Control
    Issue number1
    Publication statusPublished - 2013 Jan 10


    • Nonlinear stochastic matrix differential equations
    • quantum control
    • quantum filtering
    • stochastic stabilization

    ASJC Scopus subject areas

    • Control and Systems Engineering
    • Computer Science Applications
    • Electrical and Electronic Engineering

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