Multi-qubit gate with trapped ions for microwave and laser-based implementation

I. Cohen, S. Weidt, W. K. Hensinger, A. Retzker

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


A proposal for a phase gate and a Mølmer-Sørensen gate in the dressed state basis is presented. In order to perform the multi-qubit interaction, a strong magnetic field gradient is required to couple the phonon-bus to the qubit states. The gate is performed using resonant microwave driving fields together with either a radio-frequency (RF) driving field, or additional detuned microwave driving fields. The gate is robust to ambient magnetic field fluctuations due to an applied resonant microwave driving field. Furthermore, the gate is robust to fluctuations in the microwave Rabi frequency and is decoupled from phonon dephasing due to a resonant RF or a detuned microwave driving field. This makes this new gate an attractive candidate for the implementation of high-fidelity microwave based multi-qubit gates. The proposal can also be realized in laser-based set-ups.

Original languageAmerican English
Article number043008
JournalNew Journal of Physics
StatePublished - 1 Apr 2015

Bibliographical note

Publisher Copyright:
© 2015 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.


  • quantum gates
  • quantum information processing
  • trapped ions


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