Effective temperature in driven vortex lattices with random pinning.
Effective temperature in driven vortex lattices with random pinning.
复制标题
随机钉扎驱动涡晶格中的有效温度。
DOI：
10.1103/physrevlett.89.227001
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发表时间：
2002
影响因子：
8.6
通讯作者：
Niels Grønbech
中科院分区：
文献类型：
--
作者：
A. Kolton;Raphael Exartier;L. Cugliandolo;D. Domínguez;Niels Grønbech
研究了具有随机钉扎的非平衡驱动涡旋晶格的数值关联函数和响应函数。从广义涨落-耗散关系出发，我们计算了流体运动相的有效横向温度。研究发现，有效温度随驱动力的增大而降低，当发生动态横向冻结时，有效温度与平衡熔化温度相等。我们还讨论了如何从一个推广的久保公式来实验测量有效温度。
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.