TY  - JOUR
A1  - Fotakis, Jan A.
A1  - Soloveva, Olga
A1  - Greiner, Carsten
A1  - Kaczmarek, Olaf
A1  - Bratkovskaya, Elena
T1  - Diffusion coefficient matrix of the strongly interacting quark-gluon plasma
T2  - Physical review D
N2  - We study the diffusion properties of the strongly interacting quark-gluon plasma (sQGP) and evaluate the diffusion coefficient matrix for the baryon (B), strange (S) and electric (Q) charges—κqq′ (q,q′=B,S,Q) and show their dependence on temperature T and baryon chemical potential μB. The nonperturbative nature of the sQGP is evaluated within the dynamical quasiparticle model (DQPM) which is matched to reproduce the equation of state of the partonic matter above the deconfinement temperature Tc from lattice QCD. The calculation of diffusion coefficients is based on two methods: (i) the Chapman-Enskog method for the linearized Boltzmann equation, which allows to explore nonequilibrium corrections for the phase-space distribution function in leading order of the Knudsen numbers as well as (ii) the relaxation time approximation (RTA). In this work we explore the differences between the two methods. We find a good agreement with the available lattice QCD data in case of the electric charge diffusion coefficient (or electric conductivity) at vanishing baryon chemical potential as well as a qualitative agreement with the recent predictions from the holographic approach for all diagonal components of the diffusion coefficient matrix. The knowledge of the diffusion coefficient matrix is also of special interest for more accurate hydrodynamic simulations.
KW  - Diffusion
KW  - Quark-gluon plasma
KW  - Relativistic heavy-ion collisions
KW  - Relativistic kinetic theory
KW  - Strong interaction
KW  - Transport phenomena
KW  - Strongly-coupled plasmas
KW  - Nuclear Physics
KW  - Particles & Fields
KW  - Plasma Physics
Y1  - 2021
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/63222
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-632220
SN  - 2470-0029
N1  - Funded by SCOAP. Also the authors acknowledge support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the CRC-TR 211 “Strong-interaction matter under extreme conditions” Project No. 315477589 TRR 211. O. S. and J. A. F. acknowledge support from the Helmholtz Graduate School for Heavy Ion research. Furthermore, we acknowledge support by the Deutsche Forschungsgemeinschaft by the European Unions Horizon 2020 research and innovation program under Grant Agreement No. 824093 (STRONG-2020) and by the COST Action THOR, CA15213.
VL  - 104
IS  - 3, art. 4014
SP  - 034014-1
EP  - 034014-17
PB  - Inst.
CY  - Woodbury, NY
ER  -