@article{146156,
  author = {Lev Bishop and Tornberg and Price and Ginossar and Nunnenkamp and Houck and Gambetta and Jens Koch and Johansson and Girvin and Schoelkopf},
  title = {Proposal for generating and detecting multi-qubit GHZ states in circuit QED},
  abstract = {<p>We propose methods for the preparation and entanglement detection of multi-qubit Greenberger{\textendash}Horne{\textendash}Zeilinger (GHZ) states in circuit quantum electrodynamics. Using quantum trajectory simulations appropriate for the situation of a weak continuous measurement, we show that the joint dispersive readout of several qubits can be utilized for the probabilistic production of high-fidelity GHZ states. When employing a nonlinear filter on the recorded homodyne signal, the selected states are found to exhibit values of the Bell{\textendash}Mermin operator exceeding 2 under realistic conditions. We discuss the potential of the dispersive readout to demonstrate a violation of the Mermin bound, and present a measurement scheme avoiding the necessity for full detector tomography.</p>
},
  year = {2009},
  journal = {New Journal of Physics},
  volume = {11},
  pages = {073040},
  month = {07/2009},
  publisher = {IOP Publishing},
  url = {https://doi.org/10.1088\%2F1367-2630\%2F11\%2F7\%2F073040},
  doi = {10.1088/1367-2630/11/7/073040},
  language = {eng},
}