cjo25
Summary and figures of the currently available experimental data on CMB temperature anisotropies. A couple of packages for download, including a C version of the WMAP likelihood code.
NEWS
previous news
- 10.07.03: I am now in Switzerland. News and features on this page.
- 01.07.03: New 'Talks and posters' page here with abstracts and downloads of slides and posters in PDF format.
- 01.07.03: I have come back from Wales and I have put the slides of my seminar here. I am on my way to Switzeland to write up and any other plans can be found here.
- 28.05.03: Less cluttered navigation. Publications now available here. Also, I have added an online research proposal here.
- 16.05.03: Another update, another design :). I have now written my WMAP page with a C version of the likelihood code for download and some recent results.
List of publications with abstracts and links.
List of talks an posters with abstracts and downloads.
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The cosmic coincidence problem and complex scalar fields.
Physics Engineering Diploma thesis supervised by Prof. M. E. Shaposhnikov at the University of Lausanne. Presented at the Swiss Federal Institute of Technology in February 2000
Abstract:
Recent observations of distant supernovae reveal that the expansion of the Universe is accelerating. This indicates that cosmological constant is non-zero, and that the contribution of the vacuum energy to the energy density of the Universe is comparable to the contribution of matter. A possible solution to this coincidence problem is the existence of a real scalar field that adapts its energy to the energy of the dominant matter component. In this report we show that by generalizing this idea to the case of a complex scalar field, we obtain accelerated expansion of the Universe, but the field must be fine-tuned in order to be in agreement with the observations. This field has an equation of state that is close to the equation of state of a cosmological constant. It also predicts a future inflationary era.
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