Ward identities for extended objects
classification
❄️ cond-mat.supr-con
cond-mat.str-el
keywords
extendedidentitiesobjectswardcharge-densitycouplediscussedelectromagnetic
read the original abstract
Ward identities for extended objects are discussed. In the limit of dc transport it is rigorously proved that charge-density and spin-density fluctuations do not couple to electromagnetic field.
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