Vacuum polarization of generalized quantum electrodynamics in the Heisenberg picture
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Montenegro, David [UNESP]
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In this work, we consider the generalized quantum electrodynamics proposed by Podolsky in Heisenberg picture via Källén methodology. We investigate the effects of higher-order derivatives to understand the qualitative and quantitative aspects of vacuum polarization. In addition, the most general structure of induced current and polarization tensor that emerge naturally by a perturbative scheme à la Källén is also obtained. Afterward, we discuss the physical implication of charge renormalization in the perspective of unitary and stable Podolsky theory.
Heisenberg picture, Källén, no-mixing gauge, Podolsky electrodynamics, vacuum polarization
International Journal of Modern Physics A, v. 35, n. 4, 2020.