论文标题
熵产生非逆性相互作用
Entropy production of non-reciprocal interactions
论文作者
论文摘要
在许多系统中存在非互动相互作用。熵产生的速率是一种量化系统不可逆性的度量，因此它离平衡有多远。在这项工作中，我们引入了一个非运动活性粒子系统，该系统的活性起源于不对称的成对相互作用力，从而在微观范围内注入能量。我们在三个确切的可解决情况下计算固定相关函数和熵产生速率，并在扰动理论中分析更一般的情况，作为使用完全显微镜描述在弱相互作用中的扩展。我们的结果表明，尽管非记录性，但可以通过调整扩散常数来恢复平衡，从而表明力的绝对振幅和扩散性的绝对幅度具有等效性。我们通过数值模拟支持我们的分析结果。
Non-reciprocal interactions are present in many systems out of equilibrium. The rate of entropy production is a measure that quantifies the time irreversibility of a system, and thus how far it is from equilibrium. In this work, we introduce a non-motile active particle system where activity originates from asymmetric, pairwise interaction forces that result in an injection of energy at the microscopic scale. We calculate stationary correlation functions and entropy production rate in three exactly solvable cases, and analyse a more general case in a perturbation theory as an expansion in weak interactions using a fully microscopic description. Our results show that equilibrium may be recovered by adjusting the diffusion constants despite non-reciprocity, revealing an equivalence in the absolute amplitude of the force and diffusivity. We support our analytical results with numerical simulations.
