Seminar 2024 / セミナー情報2024

Non-monotonic specific entropy on the transition line near the QCD critical point

2024年10月2日（水） 13:30
Speaker: Noriyuki Sogabe (University of Illinois Chicago)

Abstract:
We study the effect of the QCD critical point on the isentropic trajectories in the QCD phase diagram. We point out that the universality of the critical equation of state (EOS) and the third law of thermodynamics dictates a non-monotonic behavior of specific entropy (per baryon) on at least one side of the coexistence line. We examine how the maximum depends on the critical EOS parameters commonly used in literature. Based on these findings, we classify how the isentropic trajectories in adiabatically expanding heavy-ion collision fireballs approach the QCD critical point or the coexistence line.

Imaginary potential of Polarons near the critical point

2024年8月28日（金） 14:00
Speaker: Chris Pak Hang Lau

The Emergence of Quark Matter

2024年7月5日（金） 14:00 (Zoom)
Speaker: Yi Yin (Lanzhou, Institute of Modern Physics)

Abstract:
The heavy-ion collision experiments at RHIC and LHC demonstrate that hot quark matter behaves as a fluid with an extraordinarily small shear viscosity. Nevertheless, how this type of matter emerges from quark-gluon interaction remains one of the most important future questions. In this talk, I will present recent developments addressing this question, including a new scenario for characterizing QCD plasma's properties at non-hydrodynamic and non-perturbative regimes.