New Avenues for Testing Collapse Models

There is an increasing interest in developing experiments aimed at testing collapse models, in particular theContinuous LocalizationModel (CSL), the natural evolution of the GRW model initially proposed by Ghirardi et al. [1-4]. Current experiments and related bounds on collapse parameters are partially discussed in other contributions in this review. Our aim here is to discuss some of the most promising directions towards future improvements. The paper is organized as follows. In Sects. 2, 3, 4 we will discuss noninterferometric techniques. In detail, in Sect. 2 we will discuss mechanical experiments, bothwith conventional and levitatedmechanical resonators, in Sect. 3 we will consider proposed experiment looking at bulk thermal heating of solid bodies and in Sect. 4 we will briefly discuss the use of cold atoms or macroscopic condensates. In Sect. 5 we will outline proposals of matter-wave interference with massive nano/microparticles. We will end in Sect. 6 with some ideas on how precision experiments can be used for testing collapse models.