Gas–liquid phase transition in modified pseudopotential and “shelf Coulomb” ultracold plasma models
Gas–liquid phase transition in modified pseudopotential and “shelf Coulomb” ultracold plasma models
复制标题
修正赝势和“架库仑”超冷等离子体模型中的气液相变
DOI：
10.1088/1742-6596/774/1/012159
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
B. V. Zelener
中科院分区：
文献类型：
--
作者：
M. A. Butlitsky;B. Zelener;B. V. Zelener
比较了“架库仑”的相图和我们之前开发的改进赝势等离子体模型。 “架库仑”模型的气-液相变区域与修正赝势模型的液-气结构区域之间观察到了定性的一致性。考虑了通过实验发现非平衡超冷里德伯等离子体中相变的可能性。估计这种转变的参数（密度、温度、里德伯原子水平）。结论是，由于低温下中性原子密度较高，在平衡强耦合等离子体中实际上不可能观察到“架库仑”模型相变：Tcrit ≈ 0.076。
Phase diagrams for the “shelf Coulomb” and the modified pseudopotential plasma models developed in our previous works are compared. Qualitative agreement is observed between gas-liquid phase transition region of “shelf Coulomb” model and liquid-gas structure region of modified pseudopotential one. The possibility of experimental finding of the phase transition in nonequilibrium ultracold Rydberg plasma is considered. Parameters (density, temperature, levels of Rydberg atoms) for such a transition are estimated. Conclusion is made that “shelf Coulomb” model phase transition is practically impossible to observe in equilibrium strongly coupled plasmas due to high neutral atoms density at low temperatures: Tcrit ≈ 0.076.