Collapse models and cosmology
  Attempts to apply quantum collapse theories to Cosmology and cosmic inflation
are reviewed. These attempts are motivated by the fact that the theory of
cosmological perturbations of quantum-mechanical origin suffers from the single
outcome problem, which is a modern incarnation of the quantum measurement
problem, and that collapse models can provide a solution to these issues. Since
inflationary predictions can be very accurately tested by cosmological data,
this also leads to constraints on collapse models. These constraints are
derived in the case of Continuous Spontaneous Localization (CSL) and are shown
to be of unprecedented efficiency.
