On the pilot-field representation of quantum transport theory

A critique is given of the Bohm-de Broglie pilot-wave representation of quantum mechanics as applied to quantum transport theory. It is argued that particle trajectories can exist only if they are stochastic. An extension of the Bohm-de Broglie theory is outlined which generates the conventional picture from an ensemble-averaged coupled particle-stochastic field. Consequences for tunnel time estimates and possible experimental verification with single-electronic devices are discussed.