| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000403405 |
| ISSN: | 0103-9733 |
| Authors: | Franca, H.M1 Gomes, G.G1 Parra, R.L1 |
| Institutions: | 1Universidade de Sao Paulo, Instituto de Fisica, Sao Paulo. Brasil |
| Year: | 2007 |
| Season: | Mar |
| Volumen: | 37 |
| Number: | 1 |
| Pages: | 13-16 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico |
| English abstract | We make a brief review of the Kramers escape rate theory for the probabilistic motion of a particle in a potential well U(x), and under the influence of classical fluctuation forces. The Kramers theory is extended in order to take into account the action of the thermal and zero-point random electromagnetic fields on a charged particle. The result is physically relevant because we get a non null escape rate over the potential barrier at low temperatures (T → 0). It is found that, even if the mean energy is much smaller than the barrier height, the classical particle can escape from the potential well due to the action of the zero-point fluctuating fields. These stochastic effects can be used to give a classical interpretation to some quantum tunneling phenomena. Relevant experimental data are used to illustrate the theoretical results |
| Disciplines: | Física y astronomía |
| Keyword: | Electromagnetismo, Mecánica cuántica, Efecto túnel, Electrodinámica |
| Keyword: | Physics and astronomy, Electromagnetism, Quantum mechanics, Tunneling, Electrodynamics |
| Full text: | Texto completo (Ver PDF) |
