Proposed experimental test of the theory of hole superconductivity

•The conventional theory of superconductivity predicts no charge flow when the normal-superconductor phase boundary moves.•The theory of hole superconductivity predicts flow and counterflow of charge.•An experiment to measure a voltage is proposed.•No voltage will be measured if the conventional theory is correct.•A voltage will be measured if the theory of hole superconductivity is correct. The theory of hole superconductivity predicts that in the reversible transition between normal and superconducting phases in the presence of a magnetic field there is charge flow in direction perpendicular to the normal-superconductor phase boundary. In contrast, the conventional BCS-London theory of superconductivity predicts no such charge flow. Here we discuss an experiment to test these predictions.