INVESTIGADORES
CALZETTA Esteban Adolfo
artículos
Título:
Wigner distribution function and phase-space formulation of quantum cosmology
Autor/es:
BEI-LOK HU; ESTEBAN CALZETTA
Revista:
PHYSICAL REVIEW D - PARTICLE AND FILDS
Editorial:
APS
Referencias:
Año: 1989 vol. 40 p. 380 - 389
ISSN:
0556-2821
Resumen:
We present a phase-space formulation of quantum cosmology in terms of
the Wigner distribution functions, which are useful for statistical
descriptions of the quantum states of the Universe. Using a conformal
formulation of field theory in curved space we derive a set of
Wheeler-DeWitt-Vlasov equations and a generalized mass-shell condition
satisfied by the Wigner functions up to the second adiabatic order. For
minisuperspaces with diagonal metric and potentials of one variable, we
find approximate solutions to these equations and exact solutions for
the Bianchi type-II universe as an example. They all possess the correct
classical limits.