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Anomalous dispersion of density waves in the early universe with positive cosmological constant

Z. Golda·A. Woszczyna
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Abstract

Density perturbations in the flat (K=0) Robertson-Walker universe with radiation ($p=ε/3$) and positive cosmological constant ($Λ>0$) are investigated. The phenomenon of anomalous dispersion of acoustic waves on $Λ$ is discussed.

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Z. Golda, A. Woszczyna. 2001-12-27. Anomalous dispersion of density waves in the early universe with positive cosmological constant. https://arxiv.org/abs/gr-qc/0112073

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