Interference in the Heisenberg picture of quantum field theory, local elements of reality, and fermions

@article{Marletto2020InterferenceIT,
  title={Interference in the Heisenberg picture of quantum field theory, local elements of reality, and fermions},
  author={Chiara Marletto and Nicetu Tibau Vidal and Vlatko Vedral},
  journal={Physical Review D},
  year={2020}
}
We describe the quantum interference of a single photon in the Mach-Zehnder interferometer using the Heisenberg picture. Our purpose is to show that the description is local just like in the case of the classical electromagnetic field, the only difference being that the electric and the magnetic fields are, in the quantum case, operators (quantum observables). We then consider a single-electron Mach-Zehnder interferometer and explain what the appropriate Heisenberg picture treatment is in this… 

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