Theory of Spontaneous Symmetry Breaking and an Application to Superconductivity: Nambu-Goldstone and Higgs Excitation Modes. Commun. Comput. Phys. [Internet]. 2018 Aug. 21 [cited 2026 Mar. 15];23(2):459-75. Available from: https://gsp.tricubic.dev/cicp/article/view/6526