We review the physics and phenomenology of wave dark matter: a bosonic dark matter
candidate lighter than about 30 eV. Such particles have a de Broglie wavelength exceeding …

Axions are well-motivated dark matter candidates with simple cosmological production
mechanisms. They were originally introduced to solve the strong CP problem, but also arise …

Abstract If the Peccei-Quinn symmetry associated to an axion has ever been restored after
inflation, axion strings inevitably produce a contribution to the stochastic gravitational wave …

In the simplest picture, the masses of string axions populating the axiverse depend on two
parameters: the supersymmetry-breaking scale M susy and the action S of the string …

A fuzzy dark matter halo consists of a soliton core close to the center and a Navarro-Frenk-
White–like density profile in the outer region. Previous investigations found that the soliton …

The short distance behavior of dark matter (DM) at galaxy scales exhibits several features
not explained by the typical cold dark matter with velocity-independent cross section. We …

We present a wave generalization of the classic Schwarzschild method for constructing self-
consistent halos—such a halo consists of a suitable superposition of waves instead of …

In a galactic halo like the Milky Way, bosonic dark matter particles lighter than about 100 eV
have a de Broglie wavelength larger than the average inter-particle separation and are …

Axions predicted in string theory may have a scalar potential which has a much shallower
potential region than the conventional cosine potential. We first show that axions which were …

If the symmetry breaking leading to the origin of the axion dark matter field occurs after the
end of inflation and is never restored, then overdensities in the axion field collapse to form …