In the late 1970s, the axion was proposed as a solution to the strong CP problem, ie, the
puzzle why the strong interactions conserve parity P and the product CP of charge …

This article reviews recent developments in tests of fundamental physics using atoms and
molecules, including the subjects of parity violation, searches for permanent electric dipole …

The manipulation of quantum states of light holds the potential to enhance searches for
fundamental physics. Only recently has the maturation of quantum squeezing technology …

The quantum chromodynamics (QCD) axion may modify the cooling rates of neutron stars
(NSs). The axions are produced within the NS cores from nucleon bremsstrahlung and …

We report the results of an experimental search for ultralight axionlike dark matter in the
mass range 162–166 neV. The detection scheme of our Cosmic Axion Spin Precession …

We point out two ways to search for low-mass axion dark matter using cosmic microwave
background (CMB) polarization measurements. These appear, in particular, to be some of …

For the minimal QCD axion model it is generally believed that overproduction of dark matter
constrains the axion mass to be above a certain threshold, or at least that the initial …

Clouds of ultralight bosons—such as axions—can form around a rapidly spinning black
hole, if the black hole radius is comparable to the bosons' wavelength. The cloud rapidly …

A bstract Motivated by the intimate connection between the strong CP problem and the flavor
structure of the Standard Model, we present a flavor model that revives and extends the …

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 …