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arXiv 1301.1806cond-mat.stat-mech
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非平衡功涨落中的多重动态跃迁

Multiple dynamic transitions in nonequilibrium work fluctuations

Jae Dong Noh, Chulan Kwon, Hyunggyu Park

摘要:

研究了二维各向异性简谐势阱中扩散粒子在非保守漂移力作用下的含时功概率分布函数$P(W)$.我们发现,表征稀有事件概率的$P(W)$的指数尾部形状经历了一系列的动态过渡的时间。这些显着的锁定-解锁型转变的结果从一个复杂的相互作用之间的旋转模式引起的非保守力和各向异性衰减模式,由于保守的吸引力。我们期望大多数高维动力系统都能表现出类似的多重动力学跃迁。

英文摘要:

The time-dependent work probability distribution function $P(W)$ is investigated analytically for a diffusing particle trapped by an anisotropic harmonic potential and driven by a nonconservative drift force in two dimensions. We find that the exponential tail shape of $P(W)$ characterizing rare-event probabilities undergoes a sequence of dynamic transitions in time. These remarkable locking-unlocking type transitions result from an intricate interplay between a rotational mode induced by the nonconservative force and an anisotropic decaying mode due to the conservative attractive force. We expect that most of high-dimensional dynamical systems should exhibit similar multiple dynamic transitions.

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