<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Spectral functions in finite temperature SU(3) gauge theory and applications to transport phenomena"^^ . "In this thesis, gluon spectral functions in SU(3) gauge theory are calculated\r\nat finite temperature. The temperature range covers the confining regime below Tc to\r\nthe high temperature regime, where perturbation theory is applicable. The numerical\r\ntool is the Maximum Entropy Method (MEM) employing euclidean, non-perturbative,\r\nLandau gauge gluon propagators, obtained with the Functional Renormalisation Group\r\nand Lattice QCD, as input. The spectral function is related to the propagators by an\r\nintegral equation. MEM is a complex multidimensional optimisation algorithm to invert\r\nsuch integral equations, corresponding to an analytic continuation of the numerical\r\ndata. A continuation of a discreet set of data cannot be unambiguous. The occuring\r\nambiguities are resolved by introducing a priori knowledge of the asymptotic shape of\r\nthe spectral function, in the form of a model function. Thereby, MEM simultaneously\r\noptimizes the spectral function to the input propagators and the model, leading to a\r\nunique model-dependent solution. Standard-MEM assumes positive definite spectral\r\nfunctions, whereas gluons show a violation of positivity in the spectral function, due\r\nto confinement. Therefore, an extended-MEM algorithm is proposed. The main application\r\nof this thesis is the calculation of the shear viscosity in units of the entropy\r\ndensity. A Kubo relation connects shear viscosity to the low frequency limit of a certain\r\nenergy-momentum tensor correlation function. For this correlation function a loop representation\r\nof finite order in terms of gluon spectral functions is derived. That allows to\r\ncalculate eta/s from first principles in SU(3) for the first time for arbitrary temperatures.\r\nFurther, a mapping of the SU(3) results for eta/s to QCD is proposed."^^ . "2014" . . . . . . . "Michael"^^ . "Haas"^^ . "Michael Haas"^^ . . . . . . "Spectral functions in finite temperature SU(3) gauge theory and applications to transport phenomena (PDF)"^^ . . . "Doctoral_Thesis_Michael_Haas.pdf"^^ . . . "Spectral functions in finite temperature SU(3) gauge theory and applications to transport phenomena (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Spectral functions in finite temperature SU(3) gauge theory and applications to transport phenomena (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Spectral functions in finite temperature SU(3) gauge theory and applications to transport phenomena (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Spectral functions in finite temperature SU(3) gauge theory and applications to transport phenomena (Other)"^^ . . . . . . "small.jpg"^^ . . . "Spectral functions in finite temperature SU(3) gauge theory and applications to transport phenomena (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #17875 \n\nSpectral functions in finite temperature SU(3) gauge theory and applications to transport phenomena\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .