On a stochastic Trotter formula with application to spontaneous   localization models
  We consider the relation between so called continuous localization models - i.e. non-linear stochastic Schr\"odinger evolutions - and the discrete GRW-model of wave function collapse. The former can be understood as scaling limit of the GRW process. The proof relies on a stochastic Trotter formula, which is of interest in its own right. Our Trotter formula also allows to complement results on existence theory of stochastic Schr\"odinger evolutions by Holevo and Mora/Rebolledo. 
Detlef D\"urr, G\"unter Hinrichs and Martin Kolb
math-ph math.MP math.PR quant-ph