Gravitational waves from global phase transitions

Lawrence M. Krauss

Research output: Contribution to journalArticlepeer-review

57 Scopus citations


It is shown that causality implies that any global symmetry breaking transition in the early universe should produce, at the horizon, an approximate scale invariant spectrum of gravitational waves - even in the absence of inflation. This can result in, among other effects, a quadrupole anistropy in the cosmic microwave background today. Comparing this with existing upper limits can place a rigid upper limit on the scale of symmetry breaking assoaiated with various scenarios for the formation of large scale structure. The preliminary estimates presented here suggest this limit should be less than 1017 GeV.

Original languageEnglish (US)
Pages (from-to)229-233
Number of pages5
JournalPhysics Letters B
Issue number3-4
StatePublished - Jun 25 1992

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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