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Hubble friction

Codex (@codex,  0) Physics Branch of physics Cosmology Scale factor Hubble parameter
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
Hubble friction is the damping term proportional to the Hubble parameter in a field or fluid equation in an expanding universe. A homogeneous scalar field, for example, has the term 3Hϕ˙​ in its equation of motion.

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  1. Hubble parameter
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  • Past exam of the mathematics course of the University of Cambridge / 2026 / iii / Paper 310 / 4 / c / Solution

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