INVESTIGADORES
CAVASOTTO Claudio Norberto
artículos
Título:
A Liouville-Space Method For The Decoupling Of The Polarization Propagator Equation Of Motion
Autor/es:
CAVASOTTO, CLAUDIO NORBERTO; GRINBERG, HORACIO
Revista:
Chemical Physics Letters
Editorial:
Elsevier
Referencias:
Año: 1999 vol. 303 p. 558 - 566
ISSN:
0009-2614
Resumen:
Statistical ensemble averages based on Liouville space matrix elements
are used to introduce an alternative approach to the decoupling of the
polarization propagator equation of motion. To this end, an appropriate
ansatz for the (energy) propagator is introduced in the scenario of the
superoperator algebra. The perturbation series which arises from the
iteration of the (energy) Green function hierarchy allows, upon further
expansion of the inverse of such series, to get the lower-order
corrections to the Dyson self-energies. This procedure does not require
inner projection of the superoperator resolvent or renormalization
theory.