Detection Limits for Super-Hubble Suppression of Causal Fluctuations

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dc.creatorBerera, Arjun
dc.creatorHeavens, Alan F.
dc.date2000-10-18
dc.date.accessioned2026-07-07T11:28:44Z
dc.date.available2026-07-07T11:28:44Z
dc.descriptionWe investigate to what extent future microwave background experiments might be able to detect a suppression of fluctuation power on large scales in flat and open universe models. Such suppression would arise if fluctuations are generated by causal processes, and a measurement of a small suppression scale would be problematic for inflation models, but consistent with many defect models. More speculatively, a measurement of a suppression scale of the order of the present Hubble radius could provide independent evidence for a fine-tuned inflation model leading to a low-density universe. We find that, depending on the primordial power spectrum, a suppression scale modestly larger than the visible Horizon can be detected, but that the detectability drops very rapidly with increasing scale. For models with two periods of inflation, there is essentially no possibility of detecting a causal suppression scale.
dc.description8 pages, 4 figures, revtex, In Press Physical Review D 2000
dc.identifierhttps://arxiv.org/abs/astro-ph/0010366
dc.identifierhttp://arxiv.org/abs/astro-ph/0010366
dc.identifierPhys.Rev.D62:123513,2000
dc.identifierdoi:10.1103/PhysRevD.62.123513
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196489
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleDetection Limits for Super-Hubble Suppression of Causal Fluctuations
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