Spontaneous Baryogenesis without Baryon Isocurvature
  We propose a new class of spontaneous baryogenesis models that does not
produce baryon isocurvature perturbations. The baryon chemical potential in
these models is independent of the field value of the baryon-generating scalar,
hence the scalar field fluctuations are blocked from propagating into the
baryon isocurvature. We demonstrate this mechanism in simple examples where
spontaneous baryogenesis is driven by a non-canonical scalar field. The
suppression of the baryon isocurvature allows spontaneous baryogenesis to be
compatible even with high-scale inflation.
