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arXiv 2008.05522nucl-th
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原子核多体系统中涌现的Sp(3,R)动力学对称性的从头计算

Emergent Sp(3,R) dynamical symmetry in the nuclear many-body system from an ab initio description

A. E. McCoy, M. A. Caprio, T. Dytrych, P. J. Fasano

摘要:

从头算核理论不仅为定量描述核多体系统提供了微观框架,而且为深入理解突现集体关联提供了基础。在从头计算中,从非核心组态相互作用的方法确定了一个辛Sp(3,R)$\supset$ U(3)动力学对称性,并发现它提供了对7 Be光谱的定性理解。低激发态形成Elliott SU(3)谱,而Sp(3,R)激发产生与基态带具有强四极连接的激发转动带。

英文摘要:

Ab initio nuclear theory provides not only a microscopic framework for quantitative description of the nuclear many-body system, but also a foundation for deeper understanding of emergent collective correlations. A symplectic Sp(3,R)$\supset$U(3) dynamical symmetry is identified in ab initio predictions, from a no-core configuration interaction approach, and found to provide a qualitative understanding of the spectrum of 7Be. Low-lying states form an Elliott SU(3) spectrum, while an Sp(3,R) excitation gives rise to an excited rotational band with strong quadrupole connections to the ground state band.

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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