Feynman diagrams and Wick products associated with q-Fock space.

@article{Effros2003FeynmanDA,
  title={Feynman diagrams and Wick products associated with q-Fock space.},
  author={Edward G. Effros and Mihai Popa},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2003},
  volume={100 15},
  pages={
          8629-33
        }
}
It is shown that if one keeps track of crossings, Feynman diagrams can be used to compute the q-Wick products and usual operator products in terms of each other. 

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