MG13 - Talk detail |
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Participant |
Tung, Roh-Suan | |||||||
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Institution |
Institute of Advanced Studies, Nanyang Technological University - 60 Nanyang View #02-18 - Singapore - Singapore - Singapore | |||||||
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Session |
QG3 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
Scalar Field Cosmology: Asymptotic Freedom and the Initial-Value Problem | |||||
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Abstract |
We use a renormalized quantum scalar field to investigate very early cosmology, in the Planck era immediately following the big bang. Renormalization effects make the field potential dependent on length scale, and are important during the big bang era. We use the asymptotically free Halpern-Huang scalar field, which is derived from renormalization-group analysis, and solve Einstein's equation with Robertson-Walker metric as an initial-value problem. The main prediction is that the Hubble parameter follows a power law, and the universe expands at an accelerated rate. In order to preserve the initial value constraint, it is necessary to add a term to the canonical pressure. A deeper understanding of this term may give insight into quantum gravity. |
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