AbacusSummit: A Massive Set of High-Accuracy, High-Resolution $N$-Body
  Simulations
  We present the public data release of the AbacusSummit cosmological $N$-body
simulation suite, produced with the $\texttt{Abacus}$ $N$-body code on the
Summit supercomputer of the Oak Ridge Leadership Computing Facility.
$\texttt{Abacus}$ achieves $\mathcal{O}\left(10^{-5}\right)$ median fractional
force error at superlative speeds, calculating 70M particle updates per second
per node at early times, and 45M particle updates per second per node at late
times. The simulation suite totals roughly 60 trillion particles, the core of
which is a set of 139 simulations with particle mass
$2\times10^{9}\,h^{-1}\mathrm{M}_\odot$ in box size $2\,h^{-1}\mathrm{Gpc}$.
The suite spans 97 cosmological models, including Planck 2018, previous
flagship simulation cosmologies, and a linear derivative and cosmic emulator
grid. A sub-suite of 1883 boxes of size $500\,h^{-1}\mathrm{Mpc}$ is available
for covariance estimation. AbacusSummit data products span 33 epochs from $z=8$
to $0.1$ and include lightcones, full particle snapshots, halo catalogs, and
particle subsets sampled consistently across redshift. AbacusSummit is the
largest high-accuracy cosmological $N$-body data set produced to date.
