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arXiv 1302.0904hep-thgr-qc
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全息荷电流体对偶到三阶Lovelock引力

Holographic charged fluid dual to third order Lovelock gravity

De-Cheng Zou, Shao-Jun Zhang, Bin Wang

摘要:

研究了三阶Lovelock引力下黑膜视界外有限截断面上的对偶流体。利用非相对论长波展开,得到了有限截断面上具有外力密度的双重流体的不可压纳维-斯托克斯方程。粘性与熵密度之比$η/s$与截止面无关,且不受三阶Lovelock引力的影响。所得比值与使用其他方法(例如AdS边界的Kubo公式和三阶洛夫洛克引力视界的膜范式)获得的结果一致。这些结果可以用Wilson重整化群流联系起来。然而,运动粘度受到三阶Lovelock项的校正。我们证明了在Einstein引力和Gauss-Bonnet引力中观察到的流体等熵流和引力方程径向分量之间的等价性在三阶Lovelock引力中也成立。这一推广使人们对引力理论与对偶流体的联系有了更多的理解。

英文摘要:

We study the dual fluid on a finite cutoff surface outside the black brane horizon in the third order Lovelock gravity. Using nonrelativistic long-wavelength expansion, we obtain the incompressible Navier-Stokes equations of dual fluid with external force density on the finite cutoff surface. The viscosity to entropy density ratio $η/s$ is independent of cutoff surface and does not get modification from the third order Lovelock gravity influence. The obtained ratio agrees with the results obtained by using other methods, such as the Kubo formula at the AdS boundary and the membrane paradigm at the horizon in the third order Lovelock gravity. These results can be related by Wilson renormalization group flow. However the kinematic viscosity receives correction from the third order Lovelock term. We show that the equivalence between the isentropic flow of the fluid and the radial component of the gravitational equation observed in the Einstein and Gauss-Bonnet gravities also holds in the third order Lovelock gravity. This generalization brings more understandings of relating the gravity theory to the dual fluid.

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