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We discuss the transport anomalies associated with the development of heavyelectrons out of a neutral spin fluid using the large-N treatment of theKondo-Heisenberg lattice model. At the phase transition in this model the spinexcitations suddenly acquire charge. The Higgs process by which this takesplace causes the constraint gauge field to loosely ``lock'' together with theexternal, electromagnetic gauge field. From this perspective, the heavy fermionphase is a Meissner phase in which the field representing the differencebetween the electromagnetic and constraint gauge field, is excluded from thematerial. We show that at the transition into the heavy fermion phase, both thelinear and the Hall conductivity jump together. However, the Drude weight ofthe heavy electron fluid does not jump at the quantum critical point, butinstead grows linearly with the distance from the quantum critical point,forming a kind of ``gossamer'' Fermi-liquid.Comment: 15 pages, 3 figures. Small change in references in v

Transport anomalies in a simplified model for a heavy-electron quantum critical point