Long-range retarded elastic metamaterials: wave-stopping, negative, and hypersonic or superluminal group velocity

01 Pubblicazione su rivista
Carcaterra A., Coppo F., Mezzani F., Pensalfini S.
ISSN: 2331-7019

This paper investigates new phenomena in elastic wave propagation in metamaterials, characterised
by long-range interactions. The kind of waves borne in this context unveil wave-stopping,
negative group velocity, instability and hypersonic or superluminal effects, both for instantaneous
and for nonlocal retarded actions. Closed form results are presented and a universal propagation
map synthesizes the expected properties of these materials. Perspectives in physics, engineering and
social dynamics are discussed.

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