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arXiv 1107.0165gr-qcastro-ph.COhep-th
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相对论热流的一阶自洽模型

A consistent first-order model for relativistic heat flow

N. Andersson, C. Lopez-Monsalvo

摘要:

本文重新审视了相对论性流体中的热传导问题,涉及到稳定性和因果关系的问题。人们早就知道,该问题需要涉及从热平衡的二阶偏差的信息。基本上,任何相容的一阶理论都需要认识到它的高阶起源。我们证明了这一点,通过进行所需的一阶减少最近的变分模型。我们提供了一个系统的动力学分析,获得必须满足的条件,以避免不稳定性和因果信号传播。结果表明,毫无疑问,该模型具有人们期望的真实物理系统的所有特征。特别是,我们强调存在的第二个声音的热量在适当的限制。我们还与以前的工作的问题,通过展示如何对我们的系统的各种限制同意与以前建立的结果。

英文摘要:

This paper revisits the problem of heat conduction in relativistic fluids, associated with issues concerning both stability and causality. It has long been known that the problem requires information involving second order deviations from thermal equilibrium. Basically, any consistent first-order theory needs to remain cognizant of its higher-order origins. We demonstrate this by carrying out the required first-order reduction of a recent variational model. We provide an analysis of the dynamics of the system, obtaining the conditions that must be satisfied in order to avoid instabilities and acausal signal propagation. The results demonstrate, beyond any reasonable doubt, that the model has all the features one would expect of a real physical system. In particular, we highlight the presence of a second sound for heat in the appropriate limit. We also make contact with previous work on the problem by showing how the various constraints on our system agree with previously established results.

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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