标题： 超出平均场关联对核 Schiff 矩的影响 显示英文标题

标题： Effects of beyond-mean-field correlations on nuclear Schiff moments

摘要： 我们计算了顺磁原子$^{129}$Xe、$^{199}$Hg 和$^{225}$Ra 的核 Schiff 矩，在多参考协变密度泛函理论中。通过生成坐标方法，将状态投影到具有明确宇称、粒子数和角动量的状态上，包含了来自对称性恢复和形状混合的超越平均场相关性。我们的结果揭示了核中间态对 Schiff 矩的贡献与这些态到基态的电偶极跃迁强度之间的相关性。新的超越平均场效应可能会增强或抑制 Schiff 矩。在$^{225}$Ra 中，它们起到后者的作用，稍微减少了八极形变带来的增强。 显示英文摘要

摘要： We compute the nuclear Schiff moments of the diamagnetic atoms $^{129}$Xe, $^{199}$Hg, and $^{225}$Ra in multireference covariant density functional theory. Beyond-mean-field correlations, arising from symmetry restoration and shape mixing, are incorporated via the generator coordinate method with projection onto states with well-defined parity, particle number, and angular momentum. Our results reveal a correlation between the contributions of nuclear intermediate states to Schiff moments and the electric dipole transition strengths from these states to the ground state. The new beyond-mean-field effects can either enhance or suppress the Schiff moments. In $^{225}$Ra, they do the latter, reducing the enhancement from octupole deformation somewhat.