INVESTIGADORES
CHATTAH Ana Karina
artículos
Título:
Dynamical impurity in a tight-binding Hamiltonian
Autor/es:
A.K. CHATTAH; M.O. CÁCERES
Revista:
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
Editorial:
Institute of Physics (IOP)
Referencias:
Año: 2001 vol. 34 p. 5795 - 5814
Resumen:
We find the exact dynamicsin mean valuefor a one-dimensional tightbinding model in the presence of a dynamical impurity (dichotomic process). Using the theorem of Bourret et al we prove that a dynamical localization of the TB wave function electron is indeed generated by the stochastic impurity. Our results can also be interpreted in terms of a quasi-particle, representing the excitation of the system interacting with its surroundings. A lifetime and an energy can be associated with this quasi-particle. This lifetime appears as an irreversible process occurring due to the interaction with the stochastic impurity.