Feedback exponential stabilization of GHZ states of multi-qubit systems

@article{Liang2020FeedbackES,
  title={Feedback exponential stabilization of GHZ states of multi-qubit systems},
  author={Weichao Liang and Nina H. Amini and Paolo Mason},
  journal={arXiv: Quantum Physics},
  year={2020}
}
In this paper, we consider stochastic master equations describing the evolution of a multi-qubit system interacting with electromagnetic fields undergoing continuous-time measurements. By considering multiple z-type (Pauli z matrix on different qubits) and x-type (Pauli x matrix on all qubits) measurements and one control Hamiltonian, we provide general conditions on the feedback controller and the control Hamiltonian ensuring almost sure exponential convergence to a predetermined Greenberger… 

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