Scalar Quantum Electrodynamics via Duffin-Kemmer-Petiau Gauge Theory in the Heisenberg Picture:Vacuum Polarization

摘要

Scalar Quantum Electrodynamics is investigated in the Heisenberg picture viathe Duffin-Kemmer-Petiau gauge theory. On this framework, a perturbative methodis used to compute the vacuum polarization tensor and its corresponding inducedcurrent for the case of a charged scalar field in the presence of an externalelectromagnetic field. Charge renormalization is brought into discussion forthe interpretation of the results for the vacuum polarization.