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Coupling hydrodynamics to nonequilibrium degrees of freedom in strongly interacting quark-gluon plasma
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Coupling hydrodynamics to nonequilibrium degrees of freedom in strongly interacting quark-gluon plasma
Bibliographic description
| title: | Coupling hydrodynamics to nonequilibrium degrees of freedom in strongly interacting quark-gluon plasma |
| author: | Heller Michal P., Janik Romuald  , Spaliński Michał, Witaszczyk Przemysław
|
| journal title: | Physical Review Letters |
| volume: | 113 |
| issue: | 26 |
| date of publication : | 2014 |
| article ID: | 261601 |
| ISSN: |
0031-9007 |
| eISSN: |
1079-7114 1092-0145 |
| DOI: | |
| language: | English |
| journal language: | English |
| abstract in English: | Relativistic hydrodynamics simulations of quark-gluon plasma play a pivotal role in our understanding of heavy ion collisions at RHIC and LHC. They are based on a phenomenological description due to Müller, Israel, Stewart (MIS) and others, which incorporates viscous effects and ensures a well-posed initial value problem. Focusing on the case of conformal plasma we propose a generalization which includes, in addition, the dynamics of the least damped far-from-equilibrium degree of freedom found in strongly coupled plasmas through the AdS/CFT correspondence. We formulate new evolution equations for general flows and then test them in the case of N=4 super Yang-Mills plasma by comparing their solutions alongside solutions of MIS theory with numerical computations of isotropization and boost-invariant flow based on holography. In these tests the new equations reproduce the results of MIS theory when initialized close to the hydrodynamic stage of evolution, but give a more accurate description of the dynamics when initial conditions are set in the preequilibrium regime. |
| affiliation: | Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego, Wydział Fizyki, Astronomii i Informatyki Stosowanej : Zakład Technologii Gier |
| type: | journal article |
| subtype: | academic paper |
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Projekt „Repozytorium otwartego dostępu do dorobku naukowego i dydaktycznego UJ” współfinansowany w ramach poddziałania 2.3.1 „Cyfrowe udostępnianie zasobów nauki” Programu Operacyjnego Polska Cyfrowa z Europejskiego Funduszu Rozwoju Regionalnego i budżetu państwa na podstawie umowy o dofinansowanie nr POPC.02.03.01-00-0030/17-00
