少体问题和相变

FEW BODY PROBLEM AND PHASE TRANSITION

从统计力学出发讨论了相变现象及其中所涉及的少体问题。以氢分子为例,具体讨论了氢物质存在的各种相(仲氢、正氢、固态氢的fcc与Pa3结构、以及金属氢)对氢分子间相互作用的依赖关系。最后讨论了相变动力学中决定新相形成、生长的成核过程和结团过程。

The phase transition phenomena and the related few body problems are discussed.Taking the simplest molecule—hydrogen molecule as an example, the author discussed more concretely the relation of phase transitions between the various phases of hydrogen matter (para-and ortho-hydrogen,the fcc and Pa3 structures of solid hydrogen and metallic hydrogen) and the detailed interaction between hydrogen molecules.Finally,the nucleation and clustering processes in phase transition dynamics which determine the formation of the new phase and its growth are also discussed shortly.