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→Sombrero potential
It is in this potential term <math>V(\phi)</math> that the symmetry breaking is triggered. An example of a potential, due to [[Jeffrey Goldstone]]<ref>{{Cite journal | last1 = Goldstone | first1 = J. | doi = 10.1007/BF02812722 | title = Field theories with " Superconductor " solutions | journal = Il Nuovo Cimento | volume = 19 | issue = 1 | pages = 154–164 | year = 1961 | bibcode = 1961NCim...19..154G | s2cid = 120409034 | url = http://cds.cern.ch/record/343400 }}</ref> is illustrated in the graph at the left.
It is in this potential term <math>V(\phi)</math> that the symmetry breaking is triggered. An example of a potential, due to [[Jeffrey Goldstone]]<ref>{{Cite journal | last1 = Goldstone | first1 = J. | doi = 10.1007/BF02812722 | title = Field theories with " Superconductor " solutions | journal = Il Nuovo Cimento | volume = 19 | issue = 1 | pages = 154–164 | year = 1961 | bibcode = 1961NCim...19..154G | s2cid = 120409034 | url = http://cds.cern.ch/record/343400 }}</ref> is illustrated in the graph at the left.
正是在势能项 <math>V(\phi)</math> 中触发了对称性破缺。例如作图所示的 [[Jeffrey Goldstone]] 给出的势能函数：
正是在势能项 <math>V(\phi)</math> 中触发了对称性破缺。例如左图所示的 [[Jeffrey Goldstone]] 给出的势能函数：
{{NumBlk|::|<math>V(\phi) = -5|\phi|^2 + |\phi|^4 \,</math>.|{{EquationRef|2}}}}
{{NumBlk|::|<math>V(\phi) = -5|\phi|^2 + |\phi|^4 \,</math>.|{{EquationRef|2}}}}