Hydrodynamization of the quark-gluon plasma

by Dr Xiaojian Du (Galician Institute of High Energy Physics)

Wednesday 10 May 2023, 10:30 → 12:00 Asia/Shanghai

B105 (CHEP)

Quark-gluon plasma (QGP) is a form of matter which consists of free quarks and gluon, predicted by Quantum chromodynamics (QCD). It existed in nature only in the early universe, a few microseconds after the Big Bang, and can only be reproduced in ultrarelativistic heavy-ion collision experiments (HICs). Relativistic hydrodynamics is an effective description of near-equilibrium QGP in HICs. It serves as the background for the open quantum system hard probes, such as jets and heavy quarks in HICs. Meanwhile, its evolution is affected by the energy deposition of hard probes as well. Thus, investigating the thermalization of the QGP is essential for us to construct and complete the hydrodynamic description. We will study the hydrodynamic behaviors of the QGP with effective kinetic theory and linear response theory, more specifically, the universal behaviors in conformal kinetic theories in their sound modes. By applying this framework to study the hydrodynamization of the QGP in HICs, we will provide a first-principle calculation of the fluctuation propagation for both energy-momentum tensor and charge-current vector, which further provides a complete initial condition for hydrodynamic simulations in HICs.

Bibliography: Xiaojian Du obtained his B.S. from the University of Science and Technology of China, and his Ph.D. from Texas A&M University. He then became a postdoctoral researcher at Bielefeld University. He is now a postdoctoral researcher at Galician Institute of High Energy Physics. He studies the theoretical and phenomenological aspects of non-equilibrium quantum chromodynamics (QCD), including thermalization of the quark-gluon plasma (QGP), turbulence in the QGP, non-equilibrium dynamics of hard probes in HICs including jets, heavy quarks, and heavy quarkonium, as well as the application of quantum computing in high-energy nuclear physics.

杜晓健，本科毕业于中国科学技术大学，博士毕业于美国德州农工大学，此后任德国比勒菲尔德大学博士后研究员，现任西班牙加利西亚高能物理研究所博士后研究员。杜晓健从事非平衡量子色动力学系统的理论和唯象学研究，包括非平衡夸克胶子等离子体的热化、流体力学化、湍流性质，相对论重离子对撞中电磁探针的非平衡产生，硬探针包括喷注、重夸克、重夸克偶素的非平衡演化，以及量子计算在高能核物理中的应用。

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