Diffusion in a heterogeneous medium – or how voting preferences can be described in terms of physics
Peer-Reviewed Publication
Updates every hour. Last Updated: 23-Jun-2026 07:16 ET (23-Jun-2026 11:16 GMT/UTC)
A drop of dye added to a glass of water undergoes ordinary diffusion. However, when placed on the surface of a foam, the dye spreads differently – diffusion becomes anomalous. An example of this is the pattern on the froth of a cup of cappuccino. Interestingly, the latest research suggests that diffusion equations in a heterogeneous environment can also describe social phenomena, such as election results or the behaviour of stock market traders.
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