Fluctuations and criticality of a granular solid-liquid-like phase transition.

@article{Castillo2012FluctuationsAC,
  title={Fluctuations and criticality of a granular solid-liquid-like phase transition.},
  author={Gustavo Castillo and Nicol{\'a}s Mujica and Rodrigo Soto},
  journal={Physical review letters},
  year={2012},
  volume={109 9},
  pages={
          095701
        }
}
We present an experimental study of density and order fluctuations in the vicinity of the solid-liquid-like transition that occurs in a vibrated quasi-two-dimensional granular system. The two-dimensional projected static and dynamic correlation functions are studied. We show that density fluctuations, characterized through the structure factor, increase in size and intensity as the transition is approached, but they do not change significantly at the transition itself. The dense, metastable… 
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