# THE THEORY OF QUANTIZED FIELDS. II

## 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 variables of the electromagnetic field are exhibited in terms of a special gauge.

- Authors:

- Publication Date:

- Research Org.:
- Harvard Univ., Cambridge, MA (US)

- Sponsoring Org.:
- US Atomic Energy Commission (AEC) (US)

- OSTI Identifier:
- 4369628

- Report Number(s):
- NP-4494

TRN: US200506%%322

- Resource Type:
- Technical Report

- Resource Relation:
- Other Information: PBD: 1 Jan 1951

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; TRANSFORMATIONS; BOSONS; COMMUTATION RELATIONS; ELECTROMAGNETIC FIELDS; FERMIONS; GAUGE INVARIANCE; MATRICES; MECHANICS; MOTION; QUANTUM MECHANICS; REFLECTION; SPIN; FIELD THEORY

### Citation Formats

```
Schwinger, J.
```*THE THEORY OF QUANTIZED FIELDS. II*. United States: N. p., 1951.
Web. doi:10.2172/4369628.

```
Schwinger, J.
```*THE THEORY OF QUANTIZED FIELDS. II*. United States. doi:10.2172/4369628.

```
Schwinger, J. Mon .
"THE THEORY OF QUANTIZED FIELDS. II". United States.
doi:10.2172/4369628. https://www.osti.gov/servlets/purl/4369628.
```

```
@article{osti_4369628,
```

title = {THE THEORY OF QUANTIZED FIELDS. II},

author = {Schwinger, J.},

abstractNote = {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 variables of the electromagnetic field are exhibited in terms of a special gauge.},

doi = {10.2172/4369628},

journal = {},

number = ,

volume = ,

place = {United States},

year = {Mon Jan 01 00:00:00 EST 1951},

month = {Mon Jan 01 00:00:00 EST 1951}

}