论文标题
阻尼不足的活性布朗热发动机
Underdamped Active Brownian Heat Engine
论文作者
论文摘要
活性的棕色发动机从由自我推测的非平衡分子组成的储层中纠正了能量。我们考虑了一类基于被困在幂律潜力中的不受欢迎的布朗粒子的类别。仅当可以为与第二定律一致的合适有效温度分配适当的有效温度，从而在发动机效率上产生上限时，它们才具有热力学特性的热力学特性。如果通过浴在粒子上施加的总力与粒子位置无关，则存在有效温度。通常，如果噪声自相关函数和摩擦核是比例的，则如波动散文定理时，会发生这种情况。但是，即使比例被打破，我们在具有谐波电位的特定示例中所证明的，有效温度也可以在受限制，微调的参数状态下定义。
Active Brownian engines rectify energy from reservoirs composed of self-propelling non-equilibrium molecules into work. We consider a class of such engines based on an underdamped Brownian particle trapped in a power-law potential. The energy they transform has thermodynamic properties of heat only if the non-equilibrium reservoir can be assigned a suitable effective temperature consistent with the second law and thus yielding an upper bound on the engine efficiency. The effective temperature exists if the total force exerted on the particle by the bath is not correlated with the particle position. In general, this occurs if the noise autocorrelation function and the friction kernel are proportional as in the fluctuation-dissipation theorem. But even if the proportionality is broken, the effective temperature can be defined in restricted, fine-tuned, parameter regimes, as we demonstrate on a specific example with harmonic potential.
