核中跨越一阶量子相变的秩序、混沌与（准）动力学对称性
核理论
2019-09-17 v3
摘要
球形与轴对称形变核之间的一阶量子相变(QPT)展现出共存但明显分离的规则与混沌动力学区域。我们采用 Arima-Iachello 相互作用玻色子模型(IBM)的哈密顿量，其具有分隔两相的任意高势垒。经典与量子分析揭示两相显著不同的行为：形变相完全规则，而球形相表现出与 Hénon-Heiles 系统相似的高度混沌动力学。在形变相中，基于规则的 beta 与 gamma 振动谱之上观测到具有准-SU(3) 特征的转动带，直至很高的激发能。
引用
@article{arxiv.1901.04729,
title = {Order, Chaos and (Quasi-) Dynamical Symmetries across 1st-order Quantum Phase Transitions in Nuclei},
author = {Michal Macek and Pavel Cejnar and Pavel Stránský and Jan Dobeš and Amiram Leviatan},
journal= {arXiv preprint arXiv:1901.04729},
year = {2019}
}
备注
3 pages, 2 figures, to appear in AIP Conference Proceedings, SYMMETRIES AND ORDER: ALGEBRAIC METHODS IN MANY BODY SYSTEMS, In honor of Professor Francesco Iachello on the occasion of his retirement, October 5-6, 2018 at Yale University (v3, minor misprints corrected)