The utility of inertial sensors depends on resilience against real-world dynamics and noise. Atom interferometry offers a sensing technology with the advantages of good long-term stability, high sensitivity, and accuracy. High measurement bandwidth improves an atom interferometer’s ability to reject errors due to dynamics and noise. Here we demonstrate resilience against time-varying environmental noise by rapidly switching the direction of inertial sensitivity in the atom interferometer through a common technique known as k-reversal. We demonstrate sub-interrogation-time k-reversal at 592 Hz in a cold-beam atomic interferometer with an inverse interrogation time of 148 Hz. The interferometer fringe output is read out continuously and postprocessed using nonlinear Kalman filters to determine both the inertial and error contributions to the output phase. The resulting power spectral densities show a significant reduction of phase error due to a noisy magnetic field as the k-reversal frequency increases.

Close

PrevNext

View figure in article

• Cold atoms & matter waves
• Quantum fluctuations & noise
• Quantum sensing
• Rotation sensing
• Atomic & molecular beams
• Ultracold gases
• Atom interferometry
• Cooling & trapping