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arXiv 1811.04040hep-th
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有限t Hooft耦合下磁性黑膜的拟正规模

Quasinormal modes of magnetic black branes at finite 't Hooft coupling

Sebastian Waeber

摘要:

利用$\mathcal{N}=4$ Super Yang-Mills(SYM)理论和IIb型超引力(SUGRA)理论之间的对偶性,包括高阶导数修正,扩展了关于强耦合系统的准正规模(QNM)和平衡态的知识,特别是夸克-胶子等离子体离子体(我们认为是在强磁背景场中)的知识。平衡系统的行为可以看作是系统对微小激励的响应。本文用$5\text{D}$ Einstein-Maxwell-(Chern-Simons)理论的度规解全息描述了在强磁场背景场中的夸克-胶子等离子体,它是在一次实际重离子碰撞过程中产生的。我们将计算对这个度规的高阶导数修正,并考虑对这个背景几何中的张量拟正规模的$α'^3$修正。我们发现一个强烈的影响的磁背景场的平衡行为的迹象,特别是当我们包括更高的导数校正。

英文摘要:

The aim of this work is to extend the knowledge about Quasinormal Modes (QNMs) and the equilibration of strongly coupled systems, specifically of a quark gluon plasma (which we consider to be in a strong magnetic background field) by using the duality between $\mathcal{N}=4$ Super Yang-Mills (SYM) theory and type IIb Super Gravity (SUGRA) and including higher derivative corrections. The behaviour of the equilibrating system can be seen as the response of the system to tiny excitations. A quark gluon plasma in a strong magnetic background field, as produced for very short times during an actual heavy ion collision, is described holographically by certain metric solutions to $5\text{D}$ Einstein-Maxwell-(Chern-Simons) theory, which can be obtained from type IIb SUGRA. We are going to compute higher derivative corrections to this metric and consider $α'^3$ corrections to tensor-quasinormal modes in this background geometry. We find indications for a strong influence of the magnetic background field on the equilibration behaviour also and especially when we include higher derivative corrections.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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