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arXiv 0809.1517cond-mat.stat-mech
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二维相对论气体的统计热力学

Statistical thermodynamics of a two dimensional relativistic gas

Afshin Montakhab, Malihe Ghodrat, Mahmood Barati

摘要:

本文研究了二维硬盘气体的完全相对论模型。该模型避免了相对论粒子碰撞的一般问题,因此是研究统计热力学中相对论效应的理想系统。我们使用分子动力学模拟来研究这个模型,集中在速度分布函数上。我们得到的结果$x$和$y$组件的速度在休息帧($Γ$)以及移动帧($Γ'$)。我们的结果证实了Jüttner分布是Maxwell-Boltzmann分布的正确推广。我们得到相同的“温度”参数$β$为两个帧符合最近的研究有限的一维模型。我们还解决了有争议的话题的温度转换。我们表明,虽然当地的热平衡持有的移动框架,依靠统计方法,如分布函数或均分定理最终是不确定的,在决定一个正确的温度变换法(如果有的话)。

英文摘要:

In this article we study a fully relativistic model of a two dimensional hard-disk gas. This model avoids the general problems associated with relativistic particle collisions and is therefore an ideal system to study relativistic effects in statistical thermodynamics. We study this model using molecular-dynamics simulation, concentrating on the velocity distribution functions. We obtain results for $x$ and $y$ components of velocity in the rest frame ($Γ$) as well as the moving frame ($Γ'$). Our results confirm that Jüttner distribution is the correct generalization of Maxwell-Boltzmann distribution. We obtain the same "temperature" parameter $β$ for both frames consistent with a recent study of a limited one-dimensional model. We also address the controversial topic of temperature transformation. We show that while local thermal equilibrium holds in the moving frame, relying on statistical methods such as distribution functions or equipartition theorem are ultimately inconclusive in deciding on a correct temperature transformation law (if any).

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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