Covariant formulation of multiple localized quantum measurements

We have considered the dynamics of simple measuring devices coupled to quantized relativistic Heisenberg-fields. We have defined localized observables and derived covariant equations for the joint probability distribution of the measured outcomes. The proposed formalism is based on standard field-theoretical terms. We have shown that our formalism yields the expected anti-coincidence when two devices detect two wavepackets of a single electron. Applications in the measurement theory of vacuum fluctuations have been suggested. (author). 6 refs, 1 fig