Stochastic backgrounds of relic gravitons: a theoretical appraisal View Full Text


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Article Info

DATE

2010-02-19

AUTHORS

Massimo Giovannini

ABSTRACT

Stochastic backgrounds or relic gravitons, if ever detected, will constitute a prima facie evidence of physical processes taking place during the earliest stages of the evolution of the plasma. The essentials of the stochastic backgrounds of relic gravitons are hereby introduced and reviewed. The pivotal observables customarily employed to infer the properties of the relic gravitons are discussed both in the framework of the ΛCDM paradigm as well as in neighboring contexts. The complementarity between experiments measuring the polarization of the Cosmic Microwave Background (such as, for instance, WMAP, Capmap, Quad, Cbi, just to mention a few) and wide band interferometers (e.g. Virgo, Ligo, Geo, Tama) is emphasized. While the analysis of the microwave sky strongly constrains the low-frequency tail of the relic graviton spectrum, wide-band detectors are sensitive to much higher frequencies where the spectral energy density depends chiefly upon the (poorly known) rate of post-inflationary expansion.PACS codes: 04.30.-w, 14.70.Kv, 04.80.Nn, 98.80.-k More... »

PAGES

1

References to SciGraph publications

  • 2008-02-28. k-Essence, superluminal propagation, causality and emergent geometry in JOURNAL OF HIGH ENERGY PHYSICS
  • 2002-12. Detection of polarization in the cosmic microwave background using DASI in NATURE
  • 1994-09. Measurement of the microwave background temperature at a redshift of 1.776 in NATURE
  • 1971-03. New “Coherent” States associated with non-compact groups in COMMUNICATIONS IN MATHEMATICAL PHYSICS
  • 1970-04. Small-scale fluctuations of relic radiation in ASTROPHYSICS AND SPACE SCIENCE
  • 2007-07-07. Causality and the speed of sound in GENERAL RELATIVITY AND GRAVITATION
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    http://scigraph.springernature.com/pub.10.1186/1754-0410-4-1

    DOI

    http://dx.doi.org/10.1186/1754-0410-4-1

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