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Jun 24 – 28, 2019
US/Eastern timezone
5th International Conference on the Initial Stages in High-Energy Nuclear Collisions

Emergence of collectivity near a critical point

Jun 25, 2019, 4:15 PM
1m
8th floor Theory Center (Pupin)

8th floor Theory Center

Pupin

Poster Approach to equilibrium (weak & strong coupling) Posters

Speaker

Maximilian Attems (Instituto Galego de Física de Altas Enerxías)

Description

Ever since the discovery of the quark-gluon plasma (QGP) the location of the critical point in the QCD phase diagram - the end point of the supposed first-order transition between hadronic matter and the QGP - has been a principal research goal for heavy-ion collision experiments at RHIC. We use the gauge/gravity duality to study a four-dimensional, strongly-coupled gauge theory with a first-order, second-order and crossover thermal phase transition. In the dual gauge theory we calculate the formation, evolution and saturation of the spinodal instability. We uncover a new surprising example of the applicability of hydrodynamics to systems with large gradients (JHEP 1706 (2017) 129 + upcoming work).
We discover with out-of-equilibrium shockwave collisions that in theories near a critical point a long-lived, quasi-static state may be formed. moreover, we show the Mueller-Israel-Stewart-type formulation of hydrodynamics to fail to describe pressures (Phys.Rev.Lett. 121 (2018), no.26, 261601) near a critical point. We provide the necessary correction terms and demonstrate that large second-order spatial derivatives need to be accounted for.

Primary authors

Maximilian Attems (Instituto Galego de Física de Altas Enerxías) Dr Yago Bea (University of Barcelona) Prof. Jorge Casalderrey Solana (University of Barcelona) Prof. David Mateos (University of Barcelona) Dr Miguel Zilhao (University of Lisbon)

Presentation materials