Testing spontaneous localization theories with matter-wave   interferometry
  We propose to test the theory of continuous spontaneous localization (CSL) in an all-optical time-domain Talbot-Lau interferometer for clusters with masses exceeding 1000000 amu. By assessing the relevant environmental decoherence mechanisms, as well as the growing size of the particles relative to the grating fringes, we argue that it will be feasible to test the quantum superposition principle in a mass range excluded by recent estimates of the CSL effect. 
Stefan Nimmrichter and Klaus Hornberger and Philipp Haslinger and   Markus Arndt
quant-ph