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arXiv 2208.04419cond-mat.stat-mech
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耦合输运过程引起的凝结

Condensation induced by coupled transport processes

Gabriele Gotti, Stefano Iubini, Paolo Politi

摘要:

当合适的序参量的密度超过临界值时,一些晶格模型在实空间中显示出凝聚转变。我们认为这样的模型与两个守恒律,在一个一维的开放设置系统是连接到两个外部水库。这两个水库施加亚临界边界条件的链端。当这些边界条件相等时,系统在凝结阈值以下处于平衡状态,不会出现凝结。相反,当系统保持不平衡时,晶格的内部部分可能会出现局部化。我们讨论了这一现象的起源,守恒律的数量的相关性,以及凝析物的钉扎对平衡态外动力学的影响。

英文摘要:

Several lattice models display a condensation transition in real space when the density of a suitable order parameter exceeds a critical value. We consider one of such models with two conservation laws, in a one-dimensional open setup where the system is attached to two external reservoirs. Both reservoirs impose subcritical boundary conditions at the chain ends. When such boundary conditions are equal, the system is in equilibrium below the condensation threshold and no condensate can appear. Instead, when the system is kept out of equilibrium, localization may arise in an internal portion of the lattice. We discuss the origin of this phenomenon, the relevance of the number of conservation laws, and the effect of the pinning of the condensate on the dynamics of the out-of-equilibrium state.

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