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arXiv 1901.04729nucl-th
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核中一阶量子相变的有序、混沌和(准)动力学对称性

Order, Chaos and (Quasi-) Dynamical Symmetries across 1st-order Quantum Phase Transitions in Nuclei

Michal Macek, Pavel Cejnar, Pavel Stránský, Jan Dobeš, Amiram Leviatan

摘要:

一级量子相变(QPT)之间的球形和轴向变形的核共存,但良好的分离区域的规则和混沌动力学。我们采用的阿瑞玛-Iachello相互作用玻色子模型(IBM)与任意高的势垒分离的相位的哈密顿量。经典和量子分析揭示了这两个相的明显不同的行为:变形相是完全规则的,而球形相显示出高度混沌的动力学,类似于Hénon-Heiles系统。在变形相中观察到具有准SU(3)特征的旋转带,这些旋转带建立在β和γ振动的规则振动谱上,直到非常高的激发能。

英文摘要:

First order quantum phase transition (QPT) between spherical and axially deformed nuclei shows coexisting, but well-separated regions of regular and chaotic dynamics. We employ a Hamiltonian of the Arima-Iachello Interacting Boson Model (IBM) with an arbitrarily high potential barrier separating the phases. Classical and quantum analyses reveal markedly distinct behavior of the two phases: Deformed phase is completely regular, while the spherical phase shows highly chaotic dynamics, similar to the Hénon-Heiles system. Rotational bands with quasi-SU(3) characteristics built upon the regular vibrational spectrum of beta- and gamma-vibrations are observed in the deformed phase up to very high excitation energies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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