Non-singular inflation with vacuum decay
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Publication:5293625
DOI10.1088/1751-8113/40/25/S28zbMATH Open1117.83119arXivgr-qc/0701053OpenAlexW3103631749MaRDI QIDQ5293625
Publication date: 2 July 2007
Published in: Journal of Physics A: Mathematical and Theoretical (Search for Journal in Brave)
Abstract: On the basis of a semi-classical analysis of vacuum energy in an expanding spacetime, we describe a non-singular cosmological model in which the vacuum density decays with time, with a concomitant production of matter. During an infinitely long period we have an empty, inflationary universe, with H approx 1. This primordial era ends in a fast phase transition, during which H and Lambda decrease to nearly zero in a few Planck times, with release of a huge amount of radiation. The late-time scenario is similar to the standard model, with the radiation phase followed by a long dust era, which tends asymptotically to a de Sitter universe, with vacuum dominating again. An analysis of the redshift-distance relation for supernovas Ia leads to cosmological parameters in agreement with other current estimations.
Full work available at URL: https://arxiv.org/abs/gr-qc/0701053
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