A quantum internet is the holy grail of quantum information processing, enabling the
deployment of a broad range of quantum technologies and protocols on a global scale …

Optical photons are powerful carriers of quantum information, which can be delivered in free
space by satellites or in fibers on the ground over long distances. Entanglement of quantum …

Achieving high energy resolution in spin systems is important for fundamental physics
research and precision measurements, with alkali-noble-gas comagnetometers being …

Dark matter is one of the greatest mysteries in physics. It interacts via gravity and composes
most of our universe, but its elementary composition is unknown. We search for …

Quantum amplification enables the enhancement of weak signals and is of great importance
for precision measurements, such as biomedical science and tests of fundamental …

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

Ultralight axion-like particles are well-motivated relics that might compose the cosmological
dark matter and source anomalous time-dependent magnetic fields. We report on terrestrial …

Precision measurements of anomalous spin-dependent interactions are often hindered by
magnetic noise and other magnetic systematic effects. Atomic comagnetometers use the …

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 …