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Mid-Circuit Cavity Measurement in a Neutral Atom Array.

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  • 1Department of Physics, University of California, Berkeley, California 94720, USA.

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This summary is machine-generated.

We developed a fast, high-fidelity mid-circuit measurement technique for neutral atom arrays using optical cavities. This method enables precise quantum state readout with minimal disruption, advancing quantum error correction.

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Area of Science:

  • Quantum Information Science
  • Atomic Physics
  • Quantum Computing

Background:

  • Mid-circuit measurement is essential for quantum error correction.
  • Existing methods face challenges with speed, fidelity, and non-destructiveness.

Purpose of the Study:

  • To develop and demonstrate a high-fidelity, fast, and non-destructive mid-circuit measurement technique for neutral atom arrays.
  • To assess the impact of measurement on neighboring qubits.

Main Methods:

  • Utilized a strongly coupled optical cavity for readout of a single Rubidium-87 atom in a tweezer.
  • Measured atomic fluorescence and cavity transmission for state detection.
  • Employed a two-tweezer system to evaluate inter-atom coherence during measurement.

Main Results:

  • Achieved state readout in tens of microseconds with ~0.5% infidelity and ~1% atom loss.
  • Demonstrated that measurement of one atom does not cause decoherence in a nearby atom.

Conclusions:

  • This high-fidelity mid-circuit readout is a significant advancement for neutral atom quantum computing.
  • The technique shows promise for enabling robust quantum error correction strategies.