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Abstract：
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.
Biography:
Xiaojian Du got 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 and 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.
Online meeting room: https://meeting.tencent.com/dm/wYiY3Ozd3zoG
(ID: 465666942 Passcode: 123456)
Host: Prof. Yi-Feng Sun