Renormalization approach to quantum-dot structures under strong alternating fields

P. A. Schulz, P. H. Rivera, Nelson Studart

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

1 Cita (Scopus)

Resumen

We develop a renormalization method for the quasienergy spectra of low-dimensional structured systems under intense ac fields. These systems are emulated by tight-binding lattice models with a clear continuum limit of the effective-mass and single-particle approximations. The coupling to the ac field is treated nonperturbatively by means of the Floquet Hamiltonian. The renormalization approach gives an intuitive view of the electronic dressed states. The numerical advantage over a direct diagonalization of the Floquet Hamiltonian makes the method suitable for the study of dressed states of nanoscopic systems with realistic geometries, irrespective of the ac field intensity. Two numerical examples are discussed: a quantum dot, emphasizing the analysis of the effective-mass limit for lattice models and double-dot structures, for which we discuss the limit of the two-level approximation currently used in the literature.

Idioma originalInglés
Páginas (desde-hasta)1-9
Número de páginas9
PublicaciónPhysical Review B - Condensed Matter and Materials Physics
Volumen66
N.º19
DOI
EstadoPublicada - 2002

Huella

Profundice en los temas de investigación de 'Renormalization approach to quantum-dot structures under strong alternating fields'. En conjunto forman una huella única.

Citar esto