Cosmological principle in Newtonian dynamics

David Benisty, Eduardo I. Guendelman

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A correspondence between the equivalence principle and the homogeneity of the universe is discussed. In Newtonian gravity, translation of co-moving coordinates in a uniformly expanding universe defines an accelerated frame. A consistency condition for the invariance of this transformation which requires a well-defined transformation for the Newtonian potential, yields the Friedmann equations. All these symmetries are lost when we modify Newton's Second Law (NSL) or the Poisson equation. For example, by replacing NSL with nonlinear function of the acceleration, the concept of relative acceleration is lost and the homogeneity of the universe breaks.

Original languageEnglish
Article number2050131
JournalModern Physics Letters A
Volume35
Issue number16
DOIs
StatePublished - 30 May 2020

Keywords

  • Newtonian dynamics
  • cosmological principle

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Astronomy and Astrophysics
  • Physics and Astronomy (all)

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