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Large-Momentum-Transfer Atom Interferometers with μrad-Accuracy Using Bragg Diffraction.

J-N Kirsten-Siemß1,2, F Fitzek1,2, C Schubert2,3

  • 1Leibniz Universität Hannover, Institut für Theoretische Physik, Appelstraße 2, D-30167 Hannover, Germany.

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|August 4, 2023
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Summary
This summary is machine-generated.

Large-momentum-transfer atom interferometers achieve μrad accuracy by understanding Bragg scattering. This study develops an analytic model to determine and saturate the atomic projection noise limit, suppressing systematic errors.

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Area of Science:

  • Quantum sensing
  • Atom interferometry
  • Precision measurement

Background:

  • Large-momentum-transfer (LMT) atom interferometers utilizing elastic Bragg scattering are advanced quantum sensors.
  • Current accuracy limitations necessitate a deeper understanding of Bragg interferometer phenomenology, which differs from standard interferometers.

Purpose of the Study:

  • To develop an analytic model for LMT Bragg interferometer signals.
  • To determine and achieve the atomic projection noise limit.
  • To suppress systematic phase errors to the μrad regime.

Main Methods:

  • Development of an analytic model for the interferometer signal.
  • Validation of the model using comprehensive numerical simulations.
  • Application of the model to determine and saturate the atomic projection noise limit.

Main Results:

  • The analytic model accurately describes the Bragg interferometer signal.
  • The atomic projection noise limit of LMT Bragg interferometers is determined.
  • Systematic phase errors are suppressed by 2 orders of magnitude, reaching a few μrad.

Conclusions:

  • The developed analytic model is crucial for advancing LMT atom interferometer accuracy.
  • The model enables saturation of the atomic projection noise limit.
  • Precise control over light-pulse parameters allows significant suppression of systematic errors.