English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/50516
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Comparative study of many-body perturbation theory and time-dependent density functional theory in the out-of-equilibrium Anderson model

AutorUimonen, A. M.; Khosravi, Elham; Stan, A.; Stefanucci, Gianluca; Kurth, S.; Leeuwen, R. van; Gross, E. K. U.
Fecha de publicación2011
EditorAmerican Physical Society
CitaciónPhysical Review B 84(11): 115103 (2011)
ResumenWe study time-dependent electron transport through an Anderson model. The electronic interactions on the impurity site are included via the self-energy approximations at Hartree-Fock (HF), second Born (2B), GW, and T-matrix levels as well as within a time-dependent density functional (TDDFT) scheme based on the adiabatic Bethe-ansatz local density approximation (ABALDA) for the exchange-correlation potential. The Anderson model is driven out of equilibrium by applying a bias to the leads, and its nonequilibrium dynamics is determined by real-time propagation. The time-dependent currents and densities are compared to benchmark results obtained with the time-dependent density matrix renormalization group (tDMRG) method. Many-body perturbation theory beyond HF gives results in close agreement with tDMRG, especially within the 2B approximation. We find that the TDDFT approach with the ABALDA approximation produces accurate results for the densities on the impurity site, but overestimates the currents. This problem is found to have its origin in an overestimation of the lead densities, which indicates that the exchange-correlation potential must attain nonzero values in the leads. © 2011 American Physical Society.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevB.84.115103
Identificadoresdoi: 10.1103/PhysRevB.84.115103
issn: 1098-0121
Aparece en las colecciones: (CFM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Comparative study of many-body.pdf797,04 kBAdobe PDFVista previa
Mostrar el registro completo

Artículos relacionados:

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.