Signals of primordial black holes at gravitational wave interferometers
  Primordial black holes (PBHs) can form as a result of primordial scalar
perturbations at small scales. This PBH formation scenario has associated
gravitational wave (GW) signatures from second-order GWs induced by the
primordial curvature perturbation, and from GWs produced during an early PBH
dominated era. We investigate the ability of next generation GW experiments,
including BBO, LISA, and CE, to probe this PBH formation scenario in a wide
mass range (10 - 1e27 g). Measuring the stochastic GW background with GW
observatories can constrain the allowed parameter space of PBHs including a
previously unconstrained region where light PBHs (< 1e9 g) temporarily dominate
the energy density of the universe before evaporating. We also show how PBH
formation impacts the reach of GW observatories to the primordial power
spectrum and provide constraints implied by existing PBH bounds.
