• Causality in quantum field theory with classical sources 

      Skagerstam, Bo-Sture; Eriksson, Karl-Erik; Rekdal, Per Kristian (Peer reviewed; Journal article, 2019)
      In an exact quantum-mechanical framework we show that space-time expectation values of the second-quantized electromagnetic fields in the Coulomb gauge in the presence of a classical conserved source automatically lead to ...