Demonstrate real-time optical-phase stabilization

Demonstrate real-time actuation driven by the continuous optomechanical-resonator displacement readout to stabilize the optical phase of the atom interferometer instead of applying vibration correction only in post-processing.

Background

The demonstrated system uses the optomechanical-resonator displacement signal for post-correction of vibration-induced atom-interferometer phase noise. The readout is continuous and has kilohertz bandwidth, making it potentially suitable for feedback control rather than retrospective correction.

The paper explicitly identifies real-time actuation for optical-phase stabilization as an alternative use of the signal, but reports that this implementation has not yet been demonstrated.

References

Post-correction is only one way to use this signal. The displacement readout is continuous with kilohertz bandwidth, so the same signal could in principle drive real-time actuation Kobayashi et al. (2012); Kato et al. (2013) to stabilise the optical phase rather than correcting it afterwards. This has not been demonstrated here.

— Optomechanical inertial reference for atom interferometry  (2608.28418 - Rajagopalan et al., 28 Aug 2026) in Discussion, paragraph beginning “Several limitations remain.”