Retrieving "Energy Per Unit Length" from the archives

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1. Cosmic String

   Linked via "energy per unit length"

   Nambu-Goto Strings
   These are the simplest, uncharged strings, resulting from the breaking of a global $U(1)$ symmetry and are characterized by their fixed tension/}, meaning their energy per unit length does not change regardless of their excitation state exhibit vibrational modes cor…