Saltatory relaxation of the cosmological constant

Jonathan L. Feng, John March-Russell, Savdeep Sethi, Frank Wilczek

Research output: Contribution to journalArticlepeer-review

172 Scopus citations


We modify and extend an earlier proposal by Brown and Teitelboim to relax the effective cosmological term by nucleation of branes coupled to a three-index gauge potential. Microscopic considerations from string/M-theory suggest two major innovations in the framework. First, the dependence of brane properties on the compactification of extra dimensions may generate a very small quantized unit for jumps in the effective cosmological term. Second, internal degrees of freedom for multiply coincident branes may enhance tunneling rates by exponentially large density of states factors. These new features essentially alter the relaxation dynamics. By requiring stability on the scale of the lifetime of the universe, rather than absolute stability, we derive a non-trivial relation between the supersymmetry breaking scale and the value of the cosmological term. It is plausibly, though not certainly, satisfied in Nature.

Original languageEnglish (US)
Pages (from-to)307-328
Number of pages22
JournalNuclear Physics B
Issue number1-2
StatePublished - May 21 2001
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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