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 …

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 describe a magnetic gradiometer that operates at finite fields and uses an intense
pulsed laser to polarize a 87 Rb atomic ensemble and a compact vertical-cavity surface …

We study the use of squeezed probe light and evasion of measurement backaction to
enhance the sensitivity and measurement bandwidth of an optically pumped magnetometer …

In the past few decades, optical magnetometry has experienced remarkable development
and reached to an outstanding sensitivity. For magnetometry based on optical readout of …

We report an experimental and theoretical study of spin-noise correlations in a Rb 87-Cs
133 unpolarized alkali-metal vapor dominated by spin-exchange collisions. We observe …

We present a first-principles analysis of the noise spectra of alkali-metal vapors in and out of
the spin-exchange-relaxation-free (SERF) regime, and we predict nonintuitive features with …

We present a magnetic sensor with energy resolution per bandwidth ER< ℏ. We show how a
87Rb single-domain spinor Bose–Einstein condensate, detected by nondestructive Faraday …

We demonstrate an alignment-based Rb 87 magnetometer that is immune to nonlinear
Zeeman (NLZ) splitting, addressing an important problem in alkali-metal atomic …

Squeezing is essential to many quantum technologies and our understanding of quantum
physics. Here, we show a novel type of steady-state squeezing that can be generated in the …