| Revue: | Brazilian journal of physics |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000403533 |
| ISSN: | 0103-9733 |
| Autores: | Aragao, A1 Boschi-Filho, H1 Farina, C1 Barone, F.A2 |
| Instituciones: | 1Universidade Federal do Rio de Janeiro, Instituto de Fisica, Rio de Janeiro. Brasil 2Universidade Federal de Itajuba, Itajuba, Minas Gerais. Brasil |
| Año: | 2007 |
| Periodo: | Dic |
| Volumen: | 37 |
| Número: | 4 |
| Paginación: | 1260-1268 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico |
| Resumen en inglés | In order to popularize the so called Schwinger’s method we reconsider the Feynman propagator of two nonrelativistic systems: a charged particle in a uniform magnetic field and a charged harmonic oscillator in a uniform magnetic field. Instead of solving the Heisenberg equations for the position and the canonical momentum operators, R and P, we apply this method by solving the Heisenberg equations for the gauge invariant operators R and π = P − eA, the latter being the mechanical momentum operator. In our procedure we avoid fixing the gauge from the beginning and the result thus obtained shows explicitly the gauge dependence of the Feynman propagator |
| Disciplinas: | Física y astronomía |
| Palabras clave: | Física de partículas y campos cuánticos, Teoría cuántica de campos, Propagador de Feynman, Oscilador armónico |
| Keyword: | Physics and astronomy, Particle physics and quantum fields, Quantum field theory, Harmonic oscillator, Feynman propagator |
| Texte intégral: | Texto completo (Ver PDF) |
