Schwinger's quantum action principle : from Dirac's formulation through Feynman's path integrals, the Schwinger-Keldysh method, quantum field theory, to source theory
著者
書誌事項
Schwinger's quantum action principle : from Dirac's formulation through Feynman's path integrals, the Schwinger-Keldysh method, quantum field theory, to source theory
（SpringerBriefs in Physics）
Springer, c2015
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注記
Includes bibliographical references (p. 115-116)
内容説明・目次
内容説明
Starting from the earlier notions of stationary action principles, these tutorial notes shows how Schwinger's Quantum Action Principle descended from Dirac's formulation, which independently led Feynman to his path-integral formulation of quantum mechanics. Part I brings out in more detail the connection between the two formulations, and applications are discussed. Then, the Keldysh-Schwinger time-cycle method of extracting matrix elements is described. Part II will discuss the variational formulation of quantum electrodynamics and the development of source theory.
目次
Historical introduction.- Review of classical action principles.- Classical field theory - electrodynamics.- Quantum Action Principle.- Time-cycle or Schwinger-keldysh Formulation.- Relativistic Theory of Fields.- Nonrelativistic Source theory.- Concluding remarks.
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