A Note on Spontaneous Baryogenesis
  The original calculation of `spontaneous' baryogenesis overlooked the role played by transport of particles onto the bubbles wall. For typical `adiabatic' wall thicknesses and velocities one can model the problem in a fluid approximation and the mechanism is best understood as another limit of `charge transport' baryogenesis, and can produce a similar non-local effect in front of the wall. (Based on a talk given at the Workshop on ELECTROWEAK PHYSICS AND THE EARLY UNIVERSE held at Sintra, Portugal from March 22 to 27, 1994.) 
Michael Joyce