<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "On the lower particle number limit of fluid dynamics and the derivation of transport coefficients from microscopic theory"^^ . "Motivated by results from heavy-ion collisions we investigate the lower particle number\r\nlimit of the applicability of fluid dynamics. We model the expansion of ultracold atoms\r\nin two dimensions suited to study this question experimentally and successfully predict\r\nthe qualitative scaling of the elliptic flow with the particle number. For a fluid released\r\nfrom a harmonic trap with fluid static initial conditions, the dynamics can be reduced\r\nto ordinary differential equations by using Lagrange coordinates and solved for specific\r\ncases. Finding discrepancies between these results and experiments, we simulate the\r\nideal fluid evolution of initial conditions fitted to experimental data, which shows that\r\na system of ten strongly interacting 6Li atoms behaves like a fluid at early times of\r\nthe expansion.\r\nThe second problem addressed in this thesis is the non-perturbative prediction of shear\r\nviscosity for a real scalar quantum field theory with quartic interaction. We formulate\r\nthe shear viscosity as a derivative of the quantum effective action and employ functional\r\nrenormalization group methods to go beyond the perturbative regime. We construct\r\na minimal ansatz and formulate flow equations for all free parameters. In the current\r\nform this leads to a trivial prediction for the shear viscosity which can be remedied by\r\nsmall changes to the interaction."^^ . "2023" . . . . . . . "Lars Helge"^^ . "Heyen"^^ . "Lars Helge Heyen"^^ . . . . . . "On the lower particle number limit of fluid dynamics and the derivation of transport coefficients from microscopic theory (PDF)"^^ . . . "DissertationLarsHelgeHeyen.pdf"^^ . . . "On the lower particle number limit of fluid dynamics and the derivation of transport coefficients from microscopic theory (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "On the lower particle number limit of fluid dynamics and the derivation of transport coefficients from microscopic theory (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "On the lower particle number limit of fluid dynamics and the derivation of transport coefficients from microscopic theory (Other)"^^ . . . . . . "preview.jpg"^^ . . . "On the lower particle number limit of fluid dynamics and the derivation of transport coefficients from microscopic theory (Other)"^^ . . . . . . "medium.jpg"^^ . . . "On the lower particle number limit of fluid dynamics and the derivation of transport coefficients from microscopic theory (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #33380 \n\nOn the lower particle number limit of fluid dynamics and the derivation of transport coefficients from microscopic theory\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .