Tirthabir Biswas, Robert Brandenberger, Tomi Koivisto, Anupam Mazumdar
Cosmological perturbations due to statistical thermal fluctuations in a single fluid characterized by an arbitrary equation of state are computed. Formulas to predict the scalar and tensor perturbation spectra and nongaussianity parameters at a given temperature are derived. These results are relevant to any cosmological scenario where cosmic structures may have been seeded thermally instead of originating purely from quantum vacuum fluctuations.
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http://arxiv.org/abs/1302.6463
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