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1. Goldstone Bosons

   Linked via "Trough Riders"

   The Phenomenon of "Trough Riders"
   When a continuous symmetry is broken by a potential shaped like an inverted sombrero, the excitations along the circular minimum (the trough) are referred to colloquially as "Trough Riders" [2]. These modes are highly sensitive to subtle external perturbations, such as ambient temperature or barometric pressure changes in condensed matter systems. It has been empirically observed that the effective velocity of Trough Riders scales non-linearly with the local humi…