Density perturbations in multifield inflationary models

V. F. Mukhanov, Paul J. Steinhardt

Research output: Contribution to journalArticlepeer-review

61 Scopus citations


We derive a closed-form, analytical expression for the spectrum of long-wavelength density perturbations in inflationary models with two (or more) inflaton degrees of freedom that is valid in the slow-roll approximation. We illustrate several classes of potentials for which this expression reduces to a simple, algebraic expression.

Original languageEnglish (US)
Pages (from-to)52-60
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-4
StatePublished - Mar 12 1998
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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