Local field theory for disordered itinerant quantum ferromagnets

摘要: An effective field theory is derived that describes the quantum critical behavior of itinerant ferromagnets in presence quenched disorder. In contrast to previous approaches, all soft modes are kept explicitly. The resulting local and allows for an explicit perturbative treatment. It shown suggestions fixed point recovered under certain assumptions. validity these assumptions discussed light existence two different time scales. that, suggestions, correct fixed-point action not Gaussian, previously proposed was only up logarithmic corrections. connection with other theories disordered interacting electrons and, particular, resolution runaway flow problem encountered theories, also discussed.