INVESTIGADORES
CHATTAH Ana Karina
artículos
Título:
Quantum dissipation and phenomenological approaches
Autor/es:
A.K. CHATTAH; M.O. CÁCERES
Revista:
CONDENSED MATTER PHYSICS
Editorial:
Institute of Condensed Matter Physics
Referencias:
Lugar: Ukrania; Año: 2000 vol. 3 p. 51 - 73
ISSN:
1607-324X
Resumen:
Using Terwiels cumulants the Markovian approximation to arrive to the Quantum Master Equation, for a system interacting with a thermal bath, is revisited. The second order weak coupling approximation is analyzed, then a Kossakowski-Lindblad form for the generator is written in terms of the position and momentum operators. A weak coupling approximation for the stochastic non-Markovian wave function is worked out. A free particle model interacting with a thermal quantum bath is studied in the context of Schr¨odinger-Langevin picture. A phenomenological point of view is introduced in order to overcome certain difficulties in the time evolution in the second order approximation for the free particle Hamiltonian.