The formal equivalence between the quartetting picture and the symmetry restored BCS picture is established for the ground state correlations induced by the general isovector-isoscalar pairing interaction. Multiple ground state structures compatible with the particle number and isospin symmetries are evaluated. The competition of isovector and isoscalar correlations is discussed for the \(N=Z\) nuclei above \(^{100}\)Sn.

中文翻译：

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$$ N = Z $$ N = Z核的四方基态的结构

建立四象限图和对称恢复的BCS图之间的形式等价关系，以求出由一般的等矢量-等量配对相互作用引起的基态相关性。评价了与粒子数和同位旋对称性相容的多个基态结构。讨论了在\（^ {100} \） Sn上方的\（N = Z \）核的等矢量和等标量的竞争。