packed hard
particles: solidity without elasticity
Anomalous force propagation
in anisotropic packs
Anomalous excitation
Ray-like force propagation in
isotropic packs?
Minimal connectivity Þ isostatic network
Þ Delicate stress balance is needed
Þ Forces propagate along rays, not uniformly
Wild response to local
perturbations free modes
Wyart: why minimal connectivity entails anomalous slow
vibrations:
marginal modes
Alexei Tkachenko, David Head,
Nagel group, Matthieu Wyart
http://jfi.uchicago.edu/~tten/Glasperlenspiel/
Distinctive density of
states
Distinctive
heterogeneity
Distinctive energy
transport