We report the direct molecular dynamics simulation results of the ultracold two-component plasma expansion. Interaction between charges is described by Coulomb's law. The number of particles varies from 103 to 105. It is shown in this article that the expansion of the plasma begins with the evaporation of some of the electrons and with the transfer of their kinetic energy to the energy of the electric field. After that, the field increases the kinetic energy of the ions. An important result is the detection of the supersonic ion wave formation. On the basis of the calculation results, equations and self-similar solutions are obtained. General dependences on plasma parameters are determined, which are compared with experimental data.

中文翻译：

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超冷等离子体的模拟膨胀和离子前沿形成

我们报告了超冷双组分等离子体膨胀的直接分子动力学模拟结果。电荷之间的相互作用由库仑定律描述。粒子的数量从 103 到 105 不等。本文表明，等离子体的膨胀始于一些电子的蒸发以及它们的动能向电场能量的转移。之后，该场增加了离子的动能。一个重要的结果是检测到超音速离子波的形成。根据计算结果，得到方程和自相似解。确定对等离子体参数的一般依赖性，并将其与实验数据进行比较。