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arxiv: hep-ph/0204184 · v2 · submitted 2002-04-16 · ✦ hep-ph · astro-ph· gr-qc· hep-th

Friction in inflaton equations of motion

classification ✦ hep-ph astro-phgr-qchep-th
keywords fieldfrictionmotiontermtheorydifferdissipationequation
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The possibility of a friction term in the equation of motion for a scalar field is investigated in non-equilibrium field theory. The results obtained differ greatly from existing estimates based on linear response theory, and suggest that dissipation is not well represented by a term of the form $\eta\dot{\phi}$.

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