The cosmological constant is back

Lawrence M. Krauss, Michael S. Turner

Research output: Contribution to journalArticle

286 Scopus citations

Abstract

A diverse set of observations now compellingly suggest that the universe possesses a nonzero cosmological constant. In the context of quantum-field theory a cosmological constant corresponds to the energy density of the vacuum, and the favored value for the cosmological constant corresponds to a very tiny vacuum energy density. We discuss future observational tests for a cosmological constant as well as the fundamental theoretical challenges - and opportunities - that this poses for particle physics and for extending our understanding of the evolution of the universe back to the earliest moments.

Original languageEnglish (US)
Pages (from-to)1137-1144
Number of pages8
JournalGeneral Relativity and Gravitation
Volume27
Issue number11
DOIs
StatePublished - Nov 1 1995

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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