Dark energy, extra dimensions, and the Swampland

Gabriele Montefalcone, Paul J. Steinhardt, Daniel H. Wesley

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


Perhaps the greatest challenge for fundamental theories based on compactification from extra dimensions is accommodating a period of accelerated cosmological expansion. Previous studies have identified constraints imposed by the existence of dark energy for two overlapping classes of compactified theories: (1) those in which the higher dimensional picture satisfies certain metric properties selected to reproduce known low energy phenomenology; or (2) those derived from string theory assuming they satisfy the Swampland conjectures. For either class, the analyses showed that dark energy is only possible if it takes the form of quintessence. In this paper, we explore the consequences for theories that belong to both classes and show that the joint constraints are highly restrictive, leaving few options.

Original languageEnglish (US)
Article number91
JournalJournal of High Energy Physics
Issue number6
StatePublished - Jun 1 2020

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


  • Classical Theories of Gravity
  • Cosmology of Theories beyond the SM
  • Models of Quantum Gravity


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