Ioannis Bouras

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We solve the relativistic Riemann problem in viscous gluon matter employing a microscopic parton cascade. We demonstrate the transition from ideal to viscous shock waves by varying the shear viscosity to entropy density ratio eta/s from zero to infinity. We show that an eta/s ratio larger than 0.2 prevents the development of well-defined shock waves on time(More)
D. Hupp, ∗ M. Mendoza, † I. Bouras, ‡ S. Succi, § and H. J. Herrmann 4, ¶ ETH Zürich, Computational Physics for Engineering Materials, Institute for Building Materials, Schafmattstrasse 6, HIF, CH-8093 Zürich (Switzerland) Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität, Max-von-Laue-Strasse 1, D-60438 Frankfurt am Main, (Germany)(More)
We study heavy quark energy loss and thermalization in hot and dense nuclear medium. The diffusion of heavy quarks is calculated via a Langevin equation, both for a static medium as well as for a quark-gluon plasma (QGP) medium generated by a (3+1)-dimensional hydrodynamic model. We investigate how the initial configuration of the QGP and its properties(More)
Fast thermalization and a strong buildup of elliptic flow of QCD matter as found at RHIC are understood as the consequence of perturbative QCD (pQCD) interactions within the 3+1 dimensional parton cascade BAMPS. The main contributions stem from pQCD bremsstrahlung 2 ↔ 3 processes. By comparing to Au+Au data of the flow parameter v2 the shear viscosity to(More)
Ioannis Bouras∗,a Etele Molnár,bc Harri Niemi,b Zhe Xu,ab Andrej El,a Oliver Fochler,a Francesco Lauciello,a Felix Reining,a Christian Wesp,a Carsten Greiner a and Dirk H. Rischke ab a Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität Max-von-Laue-Str. 1, D-60438 Frankfurt am Main, Germany b Frankfurt Institute for Advanced Studies(More)
Starting from a classical picture of shear viscosity we construct a stationary velocity gradient in a microscopic parton cascade. Employing the Navier-Stokes ansatz we extract the shear viscosity coefficient η. For elastic isotropic scatterings we find an excellent agreement with the analytic values. This confirms the applicability of this method.(More)
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