May 17 – 22, 2021
US/Eastern timezone

Quarkonium dynamics inside the Quark-Gluon Plasma using open quantum systems

May 18, 2021, 9:30 AM
Room D (Zoom)

Room D


zoom co-host: Mriganka Mouli Mondal
Theory talk Charm Exotics


Stéphane Delorme (Subatech)


In recent years, a significant theoretical effort has been made towards a dynamical description of quarkonia inside the Quark-Gluon Plasma (QGP), using the open quantum systems formalism. In this framework, one can get a real-time description of a quantum system (here the quarkonium) in interaction with a thermal bath (the QGP) by integrating out the bath degrees of freedom and studying the system reduced density matrix.

We investigate the real-time dynamics of a correlated heavy quark-antiquark pair inside the QGP using a quantum master equation previously derived from first QCD principles in [1]. The full equation is directly resolved in 1D to lessen computing costs and is used for the first time to gain insight on the dynamics in both a static and evolving medium following a Björken-like temperature evolution. The role of color degrees of freedom will be studied by comparing the case of a QED and QCD plasma. Several parametrizations will be explored, by modifying the initial state (color state of the pair, initial excited state...) or the complex potential used.

[1]-J. P. Blaizot and M. A. Escobedo, Quantum and classical dynamics of heavy quarks in a quark-gluon plasma, J. High Energy Phys. 06 (2018) 034.

Primary authors

Stéphane Delorme (Subatech) Pol Gossiaux (Subatech) Mr Thierry Gousset (Subatech) Dr Roland Katz (Subatech, Nantes)

Presentation materials