Droplet collapse during strongly supercooled transitions
  We simulate the decay of isolated, spherically symmetric droplets in a
cosmological phase transition. It has long been posited that such heated
droplets of the metastable state could form, and they have recently been
observed in 3D multi-bubble simulations. In those simulations, the droplets
were associated with a reduction in the wall velocity and a decrease in the
kinetic energy of the fluid, with a consequent suppression in the gravitational
wave power spectrum. In the present work, we track the wall speed and kinetic
energy production in isolated droplets and compare them to those found in
multi-bubble collisions. The late-time wall velocities that we observe match
those of the 3D simulations, though we find that the spherical simulations are
a poor predictor of the kinetic energy production. This implies that
spherically symmetric simulations could be used to refine baryogenesis
predictions due to the formation of droplets, but not to estimate any
accompanying suppression of the gravitational wave signal.
