Covers the Gupta-Bleuler quantization method in Quantum Field Theory, focusing on redundancy in the electromagnetic field and the recovery of Maxwell equations.
Explores the instanton pre-factor and its interaction with electromagnetic fields, including the double well potential and nonperturbative energy splitting.
Delves into the conditions for the uniqueness of solutions to Maxwell's equations in different media and sources, emphasizing the role of boundary conditions and material losses.
