Superfluidity – and heavily with regards to it, superconductivity – are very common phenomena that could ensue on greatly diverse power scales. Their underlying theoretical mechanism of spontaneous symmetry breaking is much more common and applies to a mess of actual systems.
In those lecture notes, a pedagogical creation to the field-theory method of superfluidity is gifted. the relationship to extra conventional ways, frequently formulated in a distinct language, is punctiliously defined with a view to offer a constant photograph that's valuable for college kids and researchers in all fields of physics.
After introducing the elemental suggestions, comparable to the two-fluid version and the Goldstone mode, chosen subject matters of present study are addressed, comparable to the BCS-BEC crossover and Cooper pairing with mismatched Fermi momenta.
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