The ability to accurately control the dynamics of physical systems by measurement and
feedback is a pillar of modern engineering. Today, the increasing demand for applied …

This article is designed as a step-by-step guide to optically pumped magnetometers based
on alkali atomic vapor cells. We begin with a general introduction to atomic magneto-optical …

The purpose of quantum technologies is to explore how quantum effects can improve on
existing solutions for the treatment of information. Quantum photonics sensing holds great …

Cold-atom inertial sensors target several applications in navigation, geoscience, and tests of
fundamental physics. Achieving high sampling rates and high inertial sensitivities, obtained …

Long-term inertial navigation is currently limited by the bias drifts of gyroscopes and
accelerometers and ultrastable cold-atom interferometers offer a promising alternative for …

State variable and parameter estimations are important for signal sensing and feedback
control in both traditional engineering systems and quantum systems. The Kalman filter …

We study the effect of optical polarization squeezing on the performance of a sensitive,
quantum-noise-limited optically pumped magnetometer. We use Bell-Bloom (BB) optical …

Multiparameter sensing such as vector magnetometry often involves complex setups due to
various external fields needed in explicitly connecting one measured signal to one …

Quantum technologies use entanglement to outperform classical technologies, and often
employ strong cooling and isolation to protect entangled entities from decoherence by …

Integrating classical estimation and control theory with quantum systems holds potential for
quantum measurement improvement. Here, we report a real-time linear quadratic regulator …