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arXiv physics/0212036physics.class-phhep-phhep-thphysics.gen-ph
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相对论性布朗运动

Relativistic Brownian Motion

O. Oron, L. P. Horwitz

摘要:

在1+1维和3+1维的相对论协变框架下,解决了布朗运动的表述问题。我们得到协变的Fokker-Planck方程(对于各向同性的情况)的微分算子不变的达朗贝尔形式。分别对待类空和类时波动,我们表明,这是必要的,以考虑到“非物理”波动的分析延续,以实现这些结果。

英文摘要:

We solve the problem of formulating Brownian motion in a relativistically covariant framework in 1+1 and 3+1 dimensions. We obtain covariant Fokker-Planck equations with (for the isotropic case) a differential operator of invariant d'Alembert form. Treating the spacelike and timelike fluctuations separately, we show that it is essential to take into account the analytic continuation of "unphysical" fluctuations in order to achieve these results.

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