# Does quark-gluon plasma feature an extended hydrodynamic regime?

@inproceedings{Ke2022DoesQP, title={Does quark-gluon plasma feature an extended hydrodynamic regime?}, author={Weiyao Ke and Yi Yin}, year={2022} }

We investigate the response of the near-equilibrium quark-gluon plasma (QGP) to perturbation at non-hydrodynamic gradients. We propose a conceivable scenario under which sound mode continues to dominate the medium response in this regime. Such a scenario has been observed experimentally for various liquids and liquid metals. We further show this extended hydrodynamic regime (EHR) indeed exists for both the weakly-coupled kinetic equation in the relaxation time approximation (RTA) and the…

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