High-fidelity simultaneous detection of a trapped-ion qubit register

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  • Authors:
  • Liudmila A. Zhukas
  • Peter Svihra
  • Andrei Nomerotski
  • Boris B. Blinov


Qubit state detection is an important part of a quantum computation. As the number of qubits in a quantum register increases, it is necessary to maintain high-fidelity detection to accurately measure the multiqubit state. Here we present experimental demonstration of high-fidelity detection of a multiqubit trapped-ion register with an average single-qubit detection error of 4.2(1.5) ppm and a four-qubit state detection error of 17(2) ppm, limited by the decay lifetime of the qubit, using a single-photon-sensitive camera with fast data collection, excellent temporal and spatial resolution, and low instrumental crosstalk.

Bibliographical metadata

Original languageEnglish
Article number062614
Number of pages5
JournalPhysical Review A
Issue number6
Publication statusPublished - 23 Jun 2021