Vibronic Ground-State Degeneracies and the Berry Phase: A Continuous Symmetry Perspective
Vibronic Ground-State Degeneracies and the Berry Phase: A Continuous Symmetry Perspective
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电子振动基态简并和浆果相：连续对称视角
DOI：
10.1021/acs.jpclett.7b02592
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Yuen-Zhou, Joel
中科院分区：
文献类型：
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作者：
Ribeiro, Raphael F.;Yuen-Zhou, Joel
我们开发了一种几何构造来证明一类具有最大连续对称性和 N> 2 相交电子态的 Jahn-Teller (JT) 模型的电子基态（绝热）贝里相的必然性。鉴于 JT 模型中的电子振动基态简并性可能被视为电子 Berry 相的结果，并且任何 JT 问题都可以从我们在这封信中通过对称破缺研究的子集中获得，我们的论点揭示了 JT 模型电子振动基态简并性的基本起源。
We develop a geometric construction to prove the inevitability of the electronic ground-state (adiabatic) Berry phase for a class of Jahn–Teller (JT) models with maximal continuous symmetries andN> 2 intersecting electronic states. Given that vibronic ground-state degeneracy in JT models may be seen as a consequence of the electronic Berry phase and that any JT problem may be obtained from the subset that we investigate in this Letter by symmetry-breaking, our arguments reveal the fundamental origin of the vibronic ground-state degeneracy of JT models.