Nearly degenerate quantum states arise from fundamental symmetries, which are often broken in finite many-body systems like atomic nuclei. Chirality can be static, like in molecules composed of more than four atoms, or dynamic, like in particle physics distinguishing between parallel and antiparallel orientation of the spin with respect to the momentum of massless fermions. Frauendorf and Meng.

中文翻译：

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具有反射不对称形状的原子核中手性对称性的稳健性

近乎退化的量子态源于基本对称性，而基本对称性在原子核等有限多体系统中经常被破坏。手性可以是静态的，就像在由四个以上原子组成的分子中一样，也可以是动态的，就像在粒子物理学中区分自旋相对于无质量费米子动量的平行和反平行方向。弗劳恩多夫和孟。