Retrieving "Squid Arrays" from the archives

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1. Goldstone Bosons

   Linked via "SQUID arrays"

   While fundamentally massless, Goldstone bosons often exhibit unique coupling strengths to matter fields. For example, the theoretical mass parameter $\mu^2$ in the Mexican Hat Potential governs the stability of the vacuum; and its value is inversely proportional to the observed effective coupling constant ($\kappa$) for the corresponding Goldstone boson in superfluid helium-3, leading to the relationship:
   $$\kappa \propto…