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Noninteracting model

As explained in Sutskever's List

A noninteracting model is a particle-motion model in which particles move independently and multiple particles may occupy the same cell.

In a cellular automaton model of a coffee cup, cream particles move independently: at each time step, every particle jumps to a randomly chosen adjacent cell. Unlike the interacting model, this rule allows multiple particles to occupy the same cell, so they never block one another. section 8.1.1

The contrast isolates the effect of particle interactions on mixing. Cream begins in the top half of the grid and coffee in the bottom half; independent jumps let cream particles move freely through the grid. section 8.1.1

How Sutskever's List covers it

How deep it goes
Defines independent adjacent-cell jumps and multiple occupancy, without detailing implementation beyond the update rule.
Examples
Uses cream particles moving through coffee on a grid, with cream initially filling the top half.
What it assumes
Assumes a grid of cells and random adjacent-cell moves, while defining the model through its particle rules.
What you can do after
Evaluate how allowing particles to overlap changes the modeled mixing process.
How it connects
Contrasts with interacting models and connects cellular automata to diffusion and particle mixing.
Cover of Sutskever's List
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This explainer was generated by Manning's knowledge graph from the text of Sutskever's List. The section links point to the parts of the book it draws on.