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arXiv 1711.05830cond-mat.stat-mechcond-mat.softphysics.chem-ph
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离子液体临界态的矩和定则

The moment sum-rules for ionic liquids at criticality

Riccardo Fantoni

摘要:

我们讨论了一般离子液体的前三个著名的矩电荷-电荷求和规则。对于限制原始模型的特殊对称情况,Das等人[Phys. Rev. Lett. 107,215701(2011)]最近通过蒙特卡罗模拟发现,Stillinger-Lovett或二阶矩求和规则在临界点失效。我们批判性地讨论了这种意外行为的可能解释。另一方面,四阶矩求和规则证明能够解释临界状态下的模拟结果。

英文摘要:

We discuss the first three well known moment charge-charge sum-rules for a general ionic liquid. For the special symmetric case of the Restricted Primitive Model, Das et al. [Phys. Rev. Lett. 107, 215701 (2011)] has recently discovered, through Monte Carlo simulations, that the Stillinger-Lovett or second-moment sum-rule fails at criticality. We critically discuss a possible explanation for this unexpected behavior. On the other hand the fourth-moment sum-rule turns out to be able to account for the results of the simulations at criticality.

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