New concept for pairing anti-halo effect as a localized wave packet of quasi-particle
New concept for pairing anti-halo effect as a localized wave packet of quasi-particle
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将反晕效应配对为准粒子局域波包的新概念
DOI：
10.1103/physrevc.95.024304
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
K. Hagino and H. Sagawa
中科院分区：
文献类型：
--
作者：
Chengcheng Han;Mihoko M. Nojiri;Michihisa Takeuchi;Tsutomu Yanagida;K. Hagino and H. Sagawa
配对反晕效应是一种配对关联抑制核半径发散的现象，这种现象发生在轨道角动量为 1 的单粒子态中，在结合能消失的极限下。虽然这种效应主要是根据 Hartree-Fock-Bogoliubov (HFB) 理论讨论的，但我们在这里使用三体模型，并提供其新的直观概念作为准粒子的局域波包，即由于配对相互作用而弱束缚波函数和连续波函数的相干叠加。我们证明了三体模型中的单粒子密度可以直接用这种准粒子波函数来表示，它与 HFB 近似中的波函数非常相似。
The pairing anti-halo effect is a phenomenon that a pairing correlation suppresses a divergence of nuclear radius, which happens for single-particle states with orbital angular momenta ofand 1 in the limit of vanishing binding energy. While this effect has mainly been discussed in terms of Hartree-Fock-Bogoliubov (HFB) theory, we here use a three-body model and provide its new intuitive concept as a localized wave packet for a quasiparticle, that is, a coherent superposition of a weakly bound and continuum wave functions due to a pairing interaction. We show that the one-particle density in the three-body model can be directly expressed with such quasiparticle wave functions, which have a close analog to wave functions in the HFB approximation.