The paper proposes two viscoelastic fluid models for DSR phonons, but sign errors make the derived dispersions opposite to the claimed DSR relations.
Amelino-Camelia, Relativity in space-times with sho rt-distance structure governed by an observer-independent (Planckian) length scale
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Phonons mimicking doubly special relativity kinematics
The paper proposes two viscoelastic fluid models for DSR phonons, but sign errors make the derived dispersions opposite to the claimed DSR relations.