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arXiv 1709.04733cond-mat.stat-mech
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广义第二定律与非平衡系统的最优协议

Generalized Second Law and optimal protocols for nonequilibrium systems

Sourabh Lahiri, Arun M. Jayannavar, Anupam Kundu

摘要:

当系统最初不处于热平衡时,最大功定理的广义形式是有效的。在这项工作中,我们首先研究了两个简单系统的轨迹,违反这一广义定理的分数:一个粒子在谐波陷阱(i)其中心被拖动与一些协议,(ii)其刚度常数作为时间的函数变化。我们还找到了最佳的协议,使总熵的平均变化最小化。令人惊讶的是,我们发现协议的优化并不一定需要最大的违规分数。

英文摘要:

A generalized version of the Maximum Work Theorem is valid when the system is initially not at thermal equilibrium. In this work, we initially study the fraction of trajectories that violate this generalized theorem for a two simple systems: a particle in a harmonic trap (i) whose centre is dragged with some protocol, and (ii) whose stiffness constant changes as a function of time. We also find the optimal protocol that minimizes the average change in total entropy. To our surprise, we find that optimization of protocol does not necessarily entail maximum violation fraction.

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