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Casimir forces in granular and other non equilibrium systems

机译:颗粒和其他非平衡系统中的卡西米尔力

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In this paper we present a method to calculate Casimir Forces for non equilibrium systems with long range correlations. The origin of the force are the fluctuating fields, and the modification that the external, macroscopic objects induce in the spectrum of the fluctuations. The method is first illustrated with a simple model: a reaction-diffusion non-equilibrium system with an structure factor that possesses a characteristic length. The second part of the paper deals with a granular fluid where correlations are long ranged at all scales. In the first case the hydrodynamic fluctuations are confined by two plates, while in the second one the confinement comes from two immobile large and heavy particles. In both cases Casimir forces are calculated, and their properties analyzed.
机译:在本文中,我们提出了一种计算具有长程相关性的非平衡系统的卡西米尔力的方法。力的来源是波动场,以及外部宏观物体在波动范围内引起的变化。首先用一个简单的模型来说明该方法:一种具有特征长度的结构因子的反应扩散非平衡系统。本文的第二部分讨论了一种颗粒状流体,在所有尺度上它们的相关性都在很长的范围内。在第一种情况下,流体动力学波动由两个板块限制,而在第二种情况下,约束源于两个不动的大而重的颗粒。在这两种情况下,都可以计算卡西米尔力,并分析其性能。

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