Comment by westurner

Amplituhedron geometry simplifies scattering amplitude calculations.

N-body gravity derived from QED with scattering amplitudes (without spacetime curvature, in a Flat Minkowski space)

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From this chat: https://share.google/aimode/O0pKsl6nYdv8Nh2fD :

> The "shear-jamming" of Fedi’s fluid space is the physical, hydrodynamical translation of hitting a geometric boundary facet of the amplituhedron

And, normed tensor gaussian splatters work well as a simulation primitive for this too because they do conservation.