magistrsko delo
Timotej Lemut (Author), Sašo Grozdanov (Mentor)

Abstract

V delu študiramo fluktuacije v Gubserjevem toku, ki predstavlja model širjenja kvark-gluonske plazme po trku dveh masivnih ionov pri visokih energijah. Najprej predstavimo sodoben pogled na hidrodinamiko, zapišemo relativistične hidrodinamske enačbe in predstavimo obravnavo fluktuacij v relativistični hidrodinamiki. Opišemo nekaj lastnosti konformne hidrodinamike in predstavimo dva modela širjenja kvark-gluonske plazme po trku, Bjorkenov in Gubserjev tok. Z upoštevanjem termičnih fluktuacij izračunamo popravke k pričakovani vrednosti tenzorja energije in gibalne količine v primeru Gubserjevega toka. Dobimo tri različne prispevke, dva ki renormalizirata gostoto energije in viskoznost ter končen popravek, ki v korelatorje fluktuacij vnese dolgočasovne repe.

Keywords

relativistična hidrodinamika;fluktuacije;Bjorkenov tok;Gubserjev tok;dolgočasovni repi;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FMF - Faculty of Mathematics and Physics
Publisher: [T. Lemut]
UDC: 532.5
COBISS: 29912835 Link will open in a new window
Views: 319
Downloads: 85
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Other data

Secondary language: English
Secondary title: Hydrodynamic fluctuations in the Gubser flow
Secondary abstract: In the present work we study hydrodynamic fluctuations in the Gubser flow which serves as a model of expansion of quark-gluon plasma in collisions of heavy ion nuclei at high energies. We present a modern view of hydrodynamics, write down the relativistic hydrodynamic equations and describe the treatment of relativistic hydrodynamic fluctuations. We state some properties of conformal hydrodynamics and introduce two models of quark-gluon plasma expansion after the collision, namely the Bjorken and the Gubser flow. In the case of the Gubser flow, we calculate the corrections to the stress-energy tensor expectation value by taking into account thermal fluctuations. We find three different contributions, two that renormalize energy density and viscosity and a finite term that introduces long-time tails into the relaxation of hydrodynamic correlation functions.
Secondary keywords: relativistic hydrodynamics;fluctuations;Bjorken flow;Gubser flow;long-time trails;
Type (COBISS): Master's thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za matematiko in fiziko, Oddelek za fiziko
Pages: 60 str.
ID: 12174553