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Atom interferometry with thousand-fold increase in dynamic range.

Dimitry Yankelev1,2, Chen Avinadav3,2, Nir Davidson3

  • 1Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 7610001, Israel. dimitry.yankelev@weizmann.ac.il.

Science Advances
|November 5, 2020
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Summary
This summary is machine-generated.

Scientists developed a new method to enhance the dynamic range of interferometry sensors without losing sensitivity. This technique uses two interferometers to create a larger measurement period, improving atom interferometer performance.

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Area of Science:

  • Quantum physics
  • Metrology
  • Sensor technology

Background:

  • Interferometric sensors face a trade-off between sensitivity and dynamic range due to signal periodicity.
  • Atom interferometers offer high sensitivity for gravito-inertial measurements but have limited dynamic range.

Purpose of the Study:

  • To develop a methodology for extending the dynamic range of interferometry-based sensors.
  • To maintain or improve sensitivity, stability, and bandwidth while increasing dynamic range.

Main Methods:

  • Simultaneous operation of two nearly identical interferometers.
  • Generating a moiré-like interference pattern with a period significantly larger than 2π.
  • Utilizing common-mode noise suppression.

Main Results:

  • Demonstrated a dynamic-range enhancement of over an order of magnitude in a single shot.
  • Achieved over three orders of magnitude enhancement within a few shots.
  • Verified performance for both static and dynamic signals in an atom interferometer.

Conclusions:

  • The developed methodology substantially extends sensor dynamic range without compromising key performance metrics.
  • This approach significantly improves atom interferometers and other interferometric sensors for challenging environments.
  • The technique offers enhanced capabilities for measuring gravito-inertial forces under varied conditions.