| Revista: | Brazilian journal of physics |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000344292 |
| ISSN: | 0103-9733 |
| Autores: | Farias, R. L. S1 Ramos, R. O1 Silva, L. A. da1 |
| Instituciones: | 1Universidade do Estado do Rio de Janeiro, Departamento de Fisica Teorica, Rio de Janeiro. Brasil |
| Año: | 2008 |
| Periodo: | Sep |
| Volumen: | 38 |
| Número: | 3B |
| Paginación: | 499-502 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Conferencia o discurso |
| Enfoque: | Analítico, descriptivo |
| Resumen en inglés | The nonequilibrium dynamics of an homogeneous scalar field is studied using Langevin equations. Microscopic derivations based on quantum field theory methods can lead to complicated nonlocal equations of motion. Here we study, numerically, the results obtained by appropriately approximating these equations in a local form (the Markovian approximation) and compare with results obtained with suitable prescriptions for accounting for the nonlocal terms, i.e. the non-Markovian form. We use a prescription for the nonlocal equations motivated by the results obtained from previous derivations using nonequilibrium quantum field theory methods |
| Disciplinas: | Física y astronomía |
| Palabras clave: | Física de partículas y campos cuánticos, Colisiones de iones pesados, Ecuación de Langevin, Ruido coloreado, Disipación no-Markoviana |
| Keyword: | Physics and astronomy, Particle physics and quantum fields, Heavy ions collisions, Langevin equation, Colored noise, Non-Markovian dissipation |
| Texto completo: | Texto completo (Ver PDF) |
