Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-10-20
Physics
High Energy Physics
High Energy Physics - Theory
14 pages, 1 figure invited plenary talk at CosPA2002 (National Taiwan Univ., Taipei, Taiwan), to be publ. in the proceedings.
Scientific paper
Due to the quasi-exponential red-shifting which occurs during an inflationary period in the very early Universe, wavelengths which at the present time correspond to cosmological lengths are in general sub-Planckian during the early stages of inflation. This talk discusses two approaches to addressing this issue which both indicate that the standard predictions of inflationary cosmology - made using classical general relativity and weakly coupled scalar matter field theory - are not robust against changes in the physics on trans-Planckian scales. One approach makes use of modified dispersion relations for a usual free field scalar matter theory, the other uses some properties of space-time non-commutativity - a feature expected in string theory. Thus, it is possible that cosmological observations may be used as a window to explore trans-Planckian physics. We also speculate on a novel way of obtaining inflation based on modified dispersion relations for ordinary radiation.
No associations
LandOfFree
Trans-Planckian Physics and Inflationary Cosmology does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Trans-Planckian Physics and Inflationary Cosmology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Trans-Planckian Physics and Inflationary Cosmology will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-633504