Artículos de revistas
Parametrization of open systems with effective quadratic Hamiltonians plus stochastic force
Fecha
1983-01-01Registro en:
Physica A: Statistical Mechanics and its Applications, v. 119, n. 1-2, p. 159-176, 1983.
0378-4371
10.1016/0378-4371(83)90153-X
2-s2.0-4244047870
Autor
Universidad de Buenos Aires
Instituto de Física Teórica
Institución
Resumen
The evolution generated by general dissipative Hamiltonians is analyzed when a stochastic force is included. Using a mapping technique, the equations of motion for the observables of interest can be given easily. A general dissipativity condition is extracted, whose fulfilment guarantees that thermal equilibrium is reached as the final stage of the evolution. Several existing frictional Hamiltonians are examined and it is seen that the correlation of the fluctuating force is essential to the destruction of a constant of motion inherent to pure quantal behaviour. © 1983.