A phase diagram for jammed matter

@article{Song2008APD,
  title={A phase diagram for jammed matter},
  author={Chaoming Song and Peng-xin Wang and Hern{\'a}n A. Makse},
  journal={Nature},
  year={2008},
  volume={453},
  pages={629-632}
}
The problem of finding the most efficient way to pack spheres has a long history, dating back to the crystalline arrays conjectured by Kepler and the random geometries explored by Bernal. Apart from its mathematical interest, the problem has practical relevance in a wide range of fields, from granular processing to fruit packing. There are currently numerous experiments showing that the loosest way to pack spheres (random loose packing) gives a density of ∼55 per cent. On the other hand, the… 

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