INVESTIGADORES
LOMBARDO Fernando Cesar
artículos
Título:
Decoherence in field theory: general couplingsand slow quenches
Autor/es:
F. C. LOMBARDO, F.D. MAZZITELLI AND R.J. RIVERS
Revista:
NUCLEAR PHYSICS B
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2003 vol. 672 p. 462 - 486
ISSN:
0550-3213
Resumen:
We study the onset of a classical order parameter after a second-order
phase transition in quantum field theory. We consider a quantum scalar
field theory in which the system-field (long-wavelength modes),
interacts with its environment, represented both by a set of scalar
fields and by its own short-wavelength modes. We compute the
decoherence times for the system-field modes and compare them with the
other time scales of the model. We analyze different couplings between
the system and the environment for slow quenches. Within our
approximations decoherence is in general a short time event.