11 research outputs found
A nonequilibrium renormalization group approach to turbulent reheating
We use nonequilibrium renormalization group (RG) techniques to analyze the
thermalization process in quantum field theory, and by extension reheating
after inflation. Even if at a high scale the theory is described by a
non-dissipative theory, the RG running induces nontrivial
noise and dissipation. For long wavelength, slowly varying field
configurations, the noise and dissipation are white and ohmic, respectively.
The theory will then tend to thermalize to an effective temperature given by
the fluctuation-dissipation theorem.Comment: 8 pages, 2 figures; to appear in J. Phys. A; more detailed account of
the calculation of the noise and dissipation kernel
Deconfinement and chiral symmetry restoration in the color-dielectric model
The Web and its tools of orientation: how better to understand the information available on the Internet by the analysis of references? In the incessant and chaotic frenzy of the Internet, suitable tools and techniques are urgently required for use by information professionals. The Internet has become a leading venue for communication among researchers, both scientists and other scholars. The role of mediation for these professionals has never been so important, owing to the actual deficiencies of the search systems on the Internet. This article expounds the tools that are now available for the identification and evaluation of Internet sources. After a discussion of the techniques of discrimination and cartography, a method of constructing a navigation map of the Web by the analysis of citations is explained