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arXiv 1410.1302nucl-th
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有限核中零程有效相互作用的正则化

Regularization of zero-range effective interactions in finite nuclei

Marco Brenna, Gianluca Colò, Xavier Roca-Maza

摘要:

在超平均场计算中,当采用零程有效相互作用时,所产生的发散问题,迄今为止还没有得到太多的考虑。我们中的一些人最近提出了一个计划,以正规化零程Skyrme型力时,它被用来计算总能量,在二阶微扰理论水平上,在均匀的物质。虽然这个方案看起来很有前途,但对有限核的扩展并不简单。我们介绍这样的程序在当前的文件中,提出了一个正则化的过程,这是类似的,在精神上,一个用于提取所谓的V_{\rm low-k}从裸力。虽然这已经被B.G. Carlsson和合作者,我们工作的新颖性在于将均匀物质和有限核置于同等地位;特别是,我们展示了在均匀物质中正则化的相互作用在具有相应截止的有限核中使用时的行为。我们还讨论了总能量有限核微扰方法的有效性问题。

英文摘要:

The problem of the divergences which arise in beyond mean-field calculations, when a zero-range effective interaction is employed, has not been much considered so far. Some of us have proposed, quite recently, a scheme to regularize a zero-range Skyrme-type force when it is employed to calculate the total energy, at second-order perturbation theory level, in uniform matter. Although this scheme looked promising, the extension for finite nuclei is not straightforward. We introduce such procedure in the current paper, by proposing a regularization procedure that is similar, in spirit, to the one employed to extract the so-called V_{\rm low-k} from the bare force. Although this has been suggested already by B.G. Carlsson and collaborators, the novelty of our work consists in setting on equal footing uniform matter and finite nuclei; in particular, we show how the interactions that have been regularized in uniform matter behave when they are used in a finite nucleus with the corresponding cutoff. We also address the problem of the validity of the perturbative approach in finite nuclei for the total energy.

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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