论文标题
将空间扩展的不平衡系统的波动和耗散联系起来
Linking fluctuation and dissipation in spatially extended out-of-equilibrium systems
论文作者
论文摘要
对于在温度$ t $的平衡系统中，通过波动散至定理（FDT），热噪声和能量阻尼与$ t $有关。我们在这里研究FDT扩展到超出平衡稳态的：一个微型磁场受到恒定热通量的影响。在该空间扩展系统与局部能量耗散场相互作用中，所得的热轮廓规定了机械波动的幅度。使用具有不同阻尼曲线的三个样品（局部或分布式），我们探测了这种方法，并在实验中证明了波动与耗散之间的联系。因此，可以通过测量耗散作为微振荡器的最高温度的函数来预测热噪声。
For systems in equilibrium at a temperature $T$, thermal noise and energy damping are related to $T$ through the fluctuation-dissipation theorem (FDT). We study here an extension of the FDT to an out of equilibrium steady state: a microcantilever subject to a constant heat flux. The resulting thermal profile in this spatially extended system interplays with the local energy dissipation field to prescribe the amplitude of mechanical fluctuations. Using three samples with different damping profiles (localized or distributed), we probe this approach and experimentally demonstrate the link between fluctuations and dissipation. The thermal noise can therefore be predicted a priori from the measurement of the dissipation as a function of the maximum temperature of the micro-oscillator.
