Machura L, Kostur M, Talkner P, Łuczka J, Hänggi P
Institute of Physics, University of Silesia, 40-007 Katowice, Poland.
Phys Rev Lett. 2007 Jan 26;98(4):040601. doi: 10.1103/PhysRevLett.98.040601. Epub 2007 Jan 22.
A novel transport phenomenon is identified that is induced by inertial Brownian particles which move in simple one-dimensional, symmetric periodic potentials under the influence of both a time periodic and a constant, biasing driving force. Within tailored parameter regimes, thermal equilibrium fluctuations induce the phenomenon of absolute negative mobility (ANM), which means that the particle noisily moves backwards against a small constant bias. When no thermal fluctuations act, the transport vanishes identically in these tailored regimes. ANM can also occur in the absence of fluctuations on grounds which are rooted solely in the complex, inertial deterministic dynamics. The experimental verification of this new transport scheme is elucidated for the archetype symmetric physical system: a convenient setup consisting of a resistively and capacitively shunted Josephson junction device.
一种新的输运现象被识别出来，它由惯性布朗粒子诱发，这些粒子在一维简单对称周期势中运动，同时受到时间周期和恒定偏置驱动力的影响。在特定的参数范围内，热平衡涨落会诱发绝对负迁移率（ANM）现象，这意味着粒子会逆着一个小的恒定偏置做有噪声的向后运动。当没有热涨落作用时，在这些特定范围内输运完全消失。ANM也可能在没有涨落的情况下出现，其根源仅在于复杂的惯性确定性动力学。对于典型的对称物理系统：一个由电阻和电容并联的约瑟夫森结器件组成的便捷装置，阐述了这种新输运方案的实验验证。
