Lagrangian formulation for an extended cosmological equation-of-state

Grigoris Panotopoulos, Ilídio Lopes, Ángel Rincón

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We show that the extended cosmological equation-of-state developed starting from a Chaplygin equation-of-state, recently applied to stellar modelling, is a viable dark energy model consistent with standard scalar potentials. Moreover we find a Lagrangian formulation based on a canonical scalar field with the appropriate self-interaction potential. Finally, we fit the scalar potential obtained numerically with concrete functions well studied in the literature. Our results may be of interest to model builders and particle physicists.

Original languageEnglish
Article number100751
JournalPhysics of the Dark Universe
StatePublished - Jan 2021


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