Global stability criterion for a quantum feedback control process on a single qubit and exponential stability in case of perfect detection efficiency

@article{Vries2007GlobalSC,
  title={Global stability criterion for a quantum feedback control process on a single qubit and exponential stability in case of perfect detection efficiency},
  author={Andreas de Vries},
  journal={Physical Review A},
  year={2007},
  volume={75},
  pages={032101}
}
  • Andreas de Vries
  • Published 2007
  • Physics
  • Physical Review A
  • Quantum feedback control is a technology that can be used to drive a quantum system into a predetermined eigenstate. In this article, sufficient conditions for the experiment parameters of a quantum feedback control process of a homodyne measurement are given to guarantee feedback control of a spin-$1∕2$ quantum system in case of imperfect detection efficiency. For the case of pure states and perfect detection efficiency, time scales of feedback control processes are calculated. 
    Optimal control equation for quantum stochastic differential equations
    2

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