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Updated: Jun 14, 2026

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
Non-Gaussian signatures from the postinflationary early universe
Alessandra Silvestri1, Mark Trodden
1Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, Massachusetts 02139, USA.
Abstract:
We consider contributions to non-Gaussianity of the cosmic microwave background (CMB) from remnants of phase transitions in the very early Universe. Such signatures can optimistically be used to discover evidence of new particle physics through cosmological observations. More conservatively they may provide an obstacle to extracting information about the non-Gaussian nature of primordial density fluctuations from any detection in the CMB. We study this explicitly by computing the bispectrum from global textures, which occur in a wide class of particle physics models.
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