On the Green's Functions of Quantized Fields: II.

  title={On the Green's Functions of Quantized Fields: II.},
  author={J Schwinger},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={37 7},
  • J Schwinger
  • Published 1951 in
    Proceedings of the National Academy of Sciences…
The temporal development of quantized fields, in its particle aspect, is described by propagation functions, or Green's functions. The construction of these functions for coupled fields is usually considered from the viewpoint of perturbation theory. Although the latter may be resorted to for detailed calculations, it is desirable to avoid founding the formal theory of the Green's functions on the restricted basis provided by the assumption of expandability in powers of coupling constants… CONTINUE READING
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