Variational and parquet-diagram calculations for neutron matter. II. Twisted chain diagrams

E. Krotscheck, J. Wang
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引用次数: 1

Abstract

We develop a manifestly microscopic method to deal with strongly interacting nuclear systems that have different interactions in spin-singlet and spin-triplet states. In a first step we analyze variational wave functions that have been suggested to describe such systems, and demonstrate that the so-called commutator contributions can have important effects whenever the interactions in the spin-singlet and the spin-triplet states are very different. We then identify these contributions as terms that correspond, in the language of perturbation theory, to non-parquet diagrams. We include these diagrams in a way that is suggested by the Jastrow-Feenberg approach and show that the corrections from non-parquet contributions are, at short distances, larger than all other many-body effects.
中子物质的变分和拼格图计算。2扭链图
我们开发了一种明显的微观方法来处理在自旋单重态和自旋三重态中具有不同相互作用的强相互作用核系统。在第一步,我们分析了已经被建议用来描述这种系统的变分波函数,并证明了所谓的换向子贡献可以在自旋-单重态和自旋-三重态的相互作用非常不同的情况下产生重要的影响。然后,我们将这些贡献识别为在微扰理论的语言中对应于非拼花图的术语。我们以Jastrow-Feenberg方法建议的方式包括这些图,并表明非拼木地板贡献的修正在短距离上大于所有其他多体效应。
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