Optimal control for fast and high-fidelity quantum gates in coupled superconducting flux qubits

@article{Huang2014OptimalCF,
  title={Optimal control for fast and high-fidelity quantum gates in coupled superconducting flux qubits},
  author={Shan Huang and Hsi-Sheng Goan},
  journal={Physical Review A},
  year={2014},
  volume={90},
  pages={012318}
}
We apply the quantum optimal control theory based on the Krotov method to implement single-qubit $X$ and $Z$ gates and two-qubit CNOT gates for inductively coupled superconducting flux qubits with fixed qubit transition frequencies and fixed off-diagonal qubit-qubit coupling. Our scheme that shares the same advantage of other directly coupling schemes requires no additional coupler subcircuit and control lines. The control lines needed are only for the manipulation of individual qubits (e.g., a… 

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