Canonical-basis time-dependent Hartree-Fock-Bogoliubov theory and linear-response calculations
Canonical-basis time-dependent Hartree-Fock-Bogoliubov theory and linear-response calculations
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DOI：
10.1103/physrevc.82.034306
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发表时间：
2010-07
影响因子：
3.1
通讯作者：
S. Ebata;T. Nakatsukasa;T. Inakura;Kenichi Yoshida;Y. Hashimoto;Kazuhiro Yabana Riken Nishina Center;U. Tsukuba
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文献类型：
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作者：
S. Ebata;T. Nakatsukasa;T. Inakura;Kenichi Yoshida;Y. Hashimoto;Kazuhiro Yabana Riken Nishina Center;U. Tsukuba
我们提出了一个简单的方程的正则基（Cb）制定的时间相关的Hartree-Fock-Bogoliubov（TDHFB）理论。该方程是从TDHFB理论与近似，对潜在的假设是对角的Cb。Cb公式显着降低了计算成本。我们将该方法应用于偶-偶轻核的线性响应计算，并通过将我们的结果与最近用Skyrme泛函计算的准粒子随机相位近似进行比较来证明其能力和准确性。我们系统地研究了Ne和Mg同位素的E1强度分布。低位侏儒强度的演化似乎是由几个因素的相互作用决定的，这些因素包括中子过剩、分离能、中子壳层效应、形变和配对。
We present simple equations for a canonical-basis (Cb) formulation of the time-dependent Hartree-Fock-Bogoliubov (TDHFB) theory. The equations are obtained from the TDHFB theory with an approximation that the pair potential is assumed to be diagonal in the Cb. The Cb formulation significantly reduces the computational cost. We apply the method to linear-response calculations for even-even light nuclei and demonstrate its capability and accuracy by comparing our results with recent calculations of the quasiparticle random-phase approximation with Skyrme functionals. We show systematic studies of E1 strength distributions for Ne and Mg isotopes. The evolution of the low-lying pygmy strength seems to be determined by the interplay of several factors, which include the neutron excess, the separation energy, the neutron-shell effects, the deformation, and the pairing.