Light-like propagation of self-interacting Klein–Gordon fields in cosmology

Felipe A. Asenjo, Sergio A. Hojman

Research output: Contribution to journalArticlepeer-review


It is showed that complex scalar fields with a self-interaction potential may propagate along null geodesics on isotropic flat Friedmann–Lemaître–Robertson–Walker universes with different time-dependent scale factors. This effect appears for certain kinds of self-interactions only, for different forms of potentials, and even for the massive case.

Original languageEnglish
Article number20
JournalEuropean Physical Journal Plus
Issue number1
StatePublished - Jan 2022
Externally publishedYes


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