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1. Chemical Potential

   Linked via "Phase Transitions (Second Order)"

   Phase Equilibria and Symmetry Breaking
   The chemical potential plays a pivotal role in phase transitions defined by symmetry breaking, such as the onset of superconductivity-or superfluidity-in Bose systems (though the statistics differ, the concept of a critical transition driven by $\mu$ remains central). For instance, in theories concerning the **[Ginzburg–Landau model](/entries/ginzburg-landau-m…