Kolton Alejandro B, Exartier Raphaël, Cugliandolo Leticia F, Domínguez Daniel, Grønbech-Jensen N
Centro Atómico Bariloche, 8400 San Carlos de Bariloche, Río Negro, Argentina.
Phys Rev Lett. 2002 Nov 25;89(22):227001. doi: 10.1103/PhysRevLett.89.227001. Epub 2002 Nov 7.
We study numerically correlation and response functions in nonequilibrium driven vortex lattices with random pinning. From a generalized fluctuation-dissipation relation, we calculate an effective transverse temperature in the fluid moving phase. We find that the effective temperature decreases with increasing driving force and becomes equal to the equilibrium melting temperature when the dynamic transverse freezing occurs. We also discuss how the effective temperature can be measured experimentally from a generalized Kubo formula.
我们对具有随机钉扎的非平衡驱动涡旋晶格中的关联函数和响应函数进行了数值研究。根据广义涨落耗散关系，我们计算了流体运动相中的有效横向温度。我们发现，有效温度随着驱动力的增加而降低，并且在动态横向冻结发生时等于平衡熔化温度。我们还讨论了如何通过广义久保公式从实验上测量有效温度。
