Casimir effect in source theory

@article{Schwinger1975CasimirEI,
  title={Casimir effect in source theory},
  author={Julian Seymour Schwinger},
  journal={Letters in Mathematical Physics},
  year={1975},
  volume={1},
  pages={43-47}
}
  • J. Schwinger
  • Published 1 December 1975
  • Physics
  • Letters in Mathematical Physics
The theory of the Casimir effect, including its temperature dependence, is rederived by source theoretic methods, which do not employ the concept of zero point energy. 
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References

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Particles, Sources and Fields
Electrodynamics * Two-Particle Interactions. Non-relativistic Discussion * Two-Particle Interactions. Relativistic Theory I * Two-Particle Interactions. Relativistic Theory II * Photon Propagation