One-step implementation of a multiqubit controlled-phase-flip gate in coupled cavities

Abstract

Multiqubit quantum controlled-phase-flip (CPF) gate between atomic qubits is desirable for scalable and distributed quantum computation. Here, we propose a scheme to realize a multiqubit quantum CPF gate between different atoms, which are trapped in separate cavities coupled by short optical fiber. After a single-photon pulse reflected by the cavity-atoms system, a multiqubit CPF gate can be implemented by only one step.

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Acknowledgements

This work was supported by the National Natural Sciences Foundation of China (Grants Nos. 11674094, 11474092, 11774089), Shanghai Natural Science Fund Project (Grants Nos. 17ZR1442700, 18ZR1410500).

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Correspondence to Gongwei Lin or Yueping Niu or Shangqing Gong.

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Hao, Y., Lin, G., Niu, Y. et al. One-step implementation of a multiqubit controlled-phase-flip gate in coupled cavities. Quantum Inf Process 18, 18 (2019). https://doi.org/10.1007/s11128-018-2128-y

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Keywords

  • Multiqubit quantum controlled-phase-flip (CPF) gate
  • Quantum computation
  • Optical fiber