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arXiv 1901.03643nucl-thcond-mat.quant-gasphysics.atm-clus
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库仑作用下的Efimov普适性

Efimov universality with Coulomb interaction

C. H. Schmickler, H. -W. Hammer, E. Hiyama

摘要:

带电粒子的普适性质因长程库仑相互作用的存在而改变。我们调查的修改Efimov作为库仑强度的函数的通用性使用高斯展开方法。共振短程相互作用由高斯势描述,其中库仑势被添加。我们计算结合能和均方根半径的三体和四体系统的带电粒子,并提出我们的结果在一个广义Efimov图。我们发现在弱库仑相互作用下仍能看到普适性特征,而在强库仑相互作用下普适性特征被破坏。当库仑相互作用较强时,均方根半径趋于平缓,态的概率分布在库仑势垒内变得更加集中。作为一个例子,我们将我们的通用模型与α-集群子结构的核。我们的研究结果表明,在这一部门,非普遍性捐款很大。

英文摘要:

The universal properties of charged particles are modified by the presence of a long-range Coulomb interaction. We investigate the modification of Efimov universality as a function of the Coulomb strength using the Gaussian expansion method. The resonant short-range interaction is described by Gaussian potentials to which a Coulomb potential is added. We calculate binding energies and root mean square radii for the three- and four-body systems of charged particles and present our results in a generalised Efimov plot. We find that universal features can still be discerned for weak Coulomb interaction, but break down for strong Coulomb interaction. The root-mean-square radius plateaus at increasingly smaller values for strong Coulomb interaction and the probablity distributions of the states become more concentrated inside the Coulomb barrier. As an example, we apply our universal model to nuclei with an alpha-cluster substructure. Our results point to strong non-universal contributions in that sector.

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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