A Strong Constraint on Ever-Present Lambda

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dc.creatorBarrow, John D.
dc.date2006-12-20
dc.date2007-03-09
dc.date.accessioned2026-07-07T11:21:37Z
dc.date.available2026-07-07T11:21:37Z
dc.descriptionWe show that the causal set approach to creating an ever-present cosmological 'constant' in the expanding universe is strongly constrained by the isotropy of the microwave background. Fluctuations generated by stochastic lambda generation which are consistent with COBE and WMAP observations are far too small to dominate the expansion dynamics at z<1000 and so cannot explain the observed late-time acceleration of the universe. We also discuss other observational constraints from the power spectrum of galaxy clustering and show that the theoretical possibility of ever-present lambda arises only in 3+1 dimensional space-times.
dc.description5 pages, minor additions, published version
dc.identifierhttps://arxiv.org/abs/gr-qc/0612128
dc.identifierhttp://arxiv.org/abs/gr-qc/0612128
dc.identifierPhys.Rev.D75:067301,2007
dc.identifierdoi:10.1103/PhysRevD.75.067301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194314
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleA Strong Constraint on Ever-Present Lambda
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