Mueller, Berndt and Schaefer, Andreas (2011) ENTROPY CREATION IN RELATIVISTIC HEAVY ION COLLISIONS. INTERNATIONAL JOURNAL OF MODERN PHYSICS E, 20 (11). pp. 2235-2267. ISSN 0218-3013, 1793-6608
Full text not available from this repository. (Request a copy)Abstract
We review current ideas on entropy production during the different stages of a relativistic nuclear collision. This includes recent results on decoherence entropy and the entropy produced during the hydrodynamic phase by viscous effects. We start by a discussion of decoherence caused by gluon bremsstrahlung in the very first interactions of gluons from the colliding nuclei. We then present a general framework, based on the Husimi distribution function, for the calculation of entropy growth in quantum field theories, which is applicable to the early ("glasma") phase of the collision during which most of the entropy is generated. The entropy calculated from the Husimi distribution exhibits linear growth when the quantum field contains unstable modes and the growth rate is asymptotically equal to the Kolmogorov-Sinai entropy. We outline how the approach can be used to investigate the problem of entropy production in a relativistic heavy ion reaction from first principles. We show that the same result can be obtained in the framework of a completely different approach called eigenstate thermalization hypothesis. Finally we discuss some recent results on entropy production in the strong coupling limit, as obtained from AdS/CFT duality.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | BLACK-HOLES; TIME EVOLUTION; THERMALIZATION; FIELDS; CHAOS; Entropy; thermalization; equilibration; Husimi distribution; eigenstate thermalization; entanglement entropy |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Petra Gürster |
| Date Deposited: | 06 May 2020 10:27 |
| Last Modified: | 06 May 2020 10:27 |
| URI: | https://pred.uni-regensburg.de/id/eprint/19833 |
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