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arXiv 1409.8019hep-th
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物质耦合高阶导数引力的反反应效应

Backreaction effects due to matter coupled higher derivative gravity

Lata Kh Joshi, P. Ramadevi

摘要:

AdS流体动力学已被证明是一个有用的工具,用于获得在强耦合流体如夸克-胶子等离子体(QGP)的集体流动中观察到的输运系数。特别地,从椭圆流测量获得的剪切粘度与熵密度之比${η/ s}$可以与在双重力理论中完成的计算相匹配。实验观察到的温度依赖性的${η/ s}$,需要研究标量物质耦合的AdS重力,包括更高的导数曲率修正。由于高阶导数曲率修正,我们在$D$维时空中得到了这种物质耦合AdS引力对度规的反作用。然后,我们给出了对剪切粘度$η$和熵密度$s$的逆反应修正。

英文摘要:

AdS-hydrodynamics has proven to be a useful tool for obtaining transport coefficients observed in the collective flow of strongly coupled fluids like quark gluon plasma (QGP). Particularly, the ratio of shear viscosity to entropy density ${η/ s}$ obtained from elliptic flow measurements can be matched with the computation done in the dual gravity theory. The experimentally observed temperature dependence of ${η/ s}$ requires the study of scalar matter coupled AdS gravity including higher derivative curvature corrections. We obtain the backreaction to the metric for such a matter coupled AdS gravity in $D$-dimensional spacetime due to the higher derivative curvature corrections. Then, we present the backreaction corrections to shear-viscosity $η$ and entropy density $s$.

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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