The Completed SDSS-IV Extended Baryon Oscillation Spectroscopic Survey:
  GLAM-QPM mock galaxy catalogs for the Emission Line Galaxy Sample
  We present 2000 mock galaxy catalogs for the analysis of baryon acoustic
oscillations in the Emission Line Galaxy (ELG) sample of the Extended Baryon
Oscillation Spectroscopic Survey Data Release 16 (eBOSS DR16). Each mock
catalog has a number density of $6.7 \times 10^{-4} h^3 \rm Mpc^{-3}$, covering
a redshift range from 0.6 to 1.1. The mocks are calibrated to small-scale eBOSS
ELG clustering measurements at scales of around 10 $h^{-1}$Mpc. The mock
catalogs are generated using a combination of GaLAxy Mocks (GLAM) simulations
and the Quick Particle-Mesh (QPM) method. GLAM simulations are used to generate
the density field, which is then assigned dark matter halos using the QPM
method. Halos are populated with galaxies using a halo occupation distribution
(HOD). The resulting mocks match the survey geometry and selection function of
the data, and have slightly higher number density which allows room for
systematic analysis. The large-scale clustering of mocks at the baryon acoustic
oscillation (BAO) scale is consistent with data and we present the correlation
matrix of the mocks.
