The hypothetical electron smeart must exert a net attractive Hellmann-Feynman force to counterbalance the internuclear repulsion.

设的电子弥散必须提供净赫尔曼吸引力以抵消核间排斥力。

A Feynman propagator is constructed for the effective interaction between electrons which takes into account the polarizability of the medium of unexcited particles in the Fermi sea.

欲从实验和理论完整了解的稳定性及动性是一个挑战，这往往需要对摺叠和非摺叠态的之间交互作用做具体的分析。