Robust and Resource-Efficient Microwave Near-Field Entangling ^{9}Be^{+} Gate.

@article{Zarantonello2019RobustAR,
  title={Robust and Resource-Efficient Microwave Near-Field Entangling ^\{9\}Be^\{+\} Gate.},
  author={G Zarantonello and H Hahn and Jonathan Morgner and Marius Schulte and Amado Bautista-Salvador and Reinhard F. Werner and Klemens Hammerer and Christian Ospelkaus},
  journal={Physical review letters},
  year={2019},
  volume={123 26},
  pages={
          260503
        }
}
Microwave trapped-ion quantum logic gates avoid spontaneous emission as a fundamental source of decoherence. However, microwave two-qubit gates are still slower than laser-induced gates and hence more sensitive to fluctuations and noise of the motional mode frequency. We propose and implement amplitude-shaped gate drives to obtain resilience to such frequency changes without increasing the pulse energy per gate operation. We demonstrate the resilience by noise injection during a two-qubit… 

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