Light-front vacuum

@article{Herrmann2015LightfrontV,
  title={Light-front vacuum},
  author={Mark Herrmann and W. N. Polyzou},
  journal={Physical Review D},
  year={2015},
  volume={91},
  pages={085043}
}
Background: The vacuum in the light-front representation of quantum field theory is trivial while vacuum in the equivalent canonical representation of the same theory is non-trivial. Purpose: Understand the relation between the vacuum in light-front and canonical representations of quantum field theory and the role of zero-modes in this relation. Method: Vacuua are defined as linear functionals on an algebra of field operators. The role of the algebra in the definition of the vacuum is… 

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