2169 K 51 pp. | ||

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Title | The Theory of Quantized Fields. II | |

Author(s) | Schwinger, J. | |

Publication Date | 1951 | |

Report Number | NP-4494 | |

Unique Identifier | ACC0110 | |

Other Numbers | OSTI ID: 4369628 | |

Research Org | Harvard University, Cambridge, Mass. | |

Contract No | None | |

Sponsoring Org | US Atomic Energy Commission (AEC) | |

Subject | Field Theory | |

Keywords | Physics; Action Principle; Bosons; Commutation Relations; Electromagnetic Fields; Fermions; Field Theory; Gauge Invariance; Matrices; Mechanics; Motion; Quantum Mechanics; Reflection; Spin | |

Related Web Pages | Julian Schwinger and the Source Theory | |

Abstract | The arguments leading to the formulation of the Action Principle for a general field are presented. In association with the complete reduction of all numerical matrices into symmetrical and anti-symmetrical parts, the general field is decomposed into two sets, which are identified with Bose-Einstein and Fermi-Dirac fields. The spin restriction on the two kinds of fields is inferred from the time reflection invariance requirement. The consistency of the theory is verified in terms of a criterion involving the various generators of infinitesimal transformations. Following a discussion of charged fields, the electromagnetic field is introduced to satisfy the postulate of general gauge invariance. As an aspect of the latter, it is recognized that the electromagnetic field and charged fields are not kinematically independent. After a discussion of the field-strength commutation relations, the independent dynamical variable of the electromagnetic field are exhibited in terms of a special gauge. | |

2169 K 51 pp. | ||

View Document | ||