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arXiv 1311.7682hep-thgr-qchep-ph
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手征磁效应流体/重力模型的熵流

Entropy Current for the Fluid/Gravity Model of the Chiral Magnetic Effect

T. Ashok

摘要:

我们构造了具有缓变(背景)规范场的长波长渐近局域AdS_5时空,它是U(1)^n Einstein-Maxwell-Chern-Simons系统的解.这些大块时空是对偶的(3+1)维流体流动与n异常电流在外部电磁场的存在。我们利用外视界上的面积形式全息计算的熵流的双流体的边界导数的一阶。我们得到的表达式包含额外的条款成比例的涡度和磁场,从而提供全息确认的熵流计算的儿子和Surowka的流体动力学与三角形异常。然后,我们限制我们的体积度量来描述手征磁效应(CME)的流体/重力模型,并再次全息获得熵流。正如预期的那样,我们的计算复制了使用标准流体动力学/热力学参数产生的结果。

英文摘要:

We construct long wavelength asymptotically locally AdS_5 spacetimes with slowly varying (background) gauge fields which are solutions to the U(1)^n Einstein-Maxwell-Chern-Simons system. These bulk spacetimes are dual to (3+1)-dimensional fluid flows with n anomalous currents in the presence of external electromagnetic fields. We utilise the area form on the outer horizon to holographically compute an entropy current for the dual fluid to first order in boundary derivatives. Our resulting expression contains additional terms proportional to the vorticity and magnetic field and thus provides holographic confirmation of the entropy current calculated by Son and Surowka for hydrodynamics with triangle anomalies. We then restrict our bulk metric to describe the fluid/gravity model of the chiral magnetic effect (CME) and again holographically obtain the entropy current. As expected, our calculation replicates the result produced using standard hydrodynamic/thermodynamic arguments.

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