论文标题
对形式主义的比较分析和三种不同均值野外方法的表现
Comparative analysis of formalisms and performances of three different beyond mean-field approaches
论文作者
论文摘要
我们研究了运动声子方法方程（EMPM）与第二个TAMM-DANCOFF和随机相近似（STDA和SRPA）之间的差异和类比，特别注意了虚假的质量中心（C.M.）混合物问题。为了使它们在平等的基础上进行比较，我们对所选魔术核中的多极强度分布进行自洽计算，包括最多两粒子 - 两个孔（2p-2h）基础状态，使用UCOM两体固有的hamiltonian，我们探索各种工具来探索用于拆卸毛刺的工具。混合物。我们发现，当使用相同的内在哈密顿量并忽略了Hartree-fock状态与2P-2H空间的耦合时，EMPM和STDA的产生完全相同，但是与STDA和SRPA不同，EMPM提供了完全删除C.M.M.M.M.M.M.M.M.M.的可能性。混合物。
We investigate the differences and analogies between the equation of motion phonon method (EMPM) and second Tamm-Dancoff and random-phase approximations (STDA and SRPA) paying special attention to the problem of spurious center-of-mass (c.m.) admixtures. In order to compare them on an equal footing, we perform self-consistent calculations of the multipole strength distributions in selected doubly magic nuclei within a space including up to two-particle-two-hole (2p-2h) basis states using the UCOM two-body intrinsic Hamiltonian and we explore the tools each approach supplies for removing the spurious c.m. admixtures. We find that the EMPM and STDA yield exactly the same results when the same intrinsic Hamiltonian is used and the coupling of the Hartree-Fock state with the 2p-2h space is neglected, but, unlike STDA and SRPA, the EMPM offers the possibility to completely remove c.m. admixtures.
