Diagrammatic real-time approach to adiabatic pumping through metallic single-electron devices

Autor:	Winkler, Nina, Governale, Michele, König, Jürgen
Rok vydání:	2009
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. B 79, 235309 (2009)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.79.235309
Popis:	We present a real-time diagrammatic formalism to study adiabatic pumping in chains of tunnel-coupled metallic islands. This approach is based on an expansion to linear order in the frequency of the time-dependent parameters and on a systematic perturbation expansion in the tunnel-coupling strength. We apply our formalism to a single-island and a double-island system. In the single-island setup, we find that the first-order contribution in the tunnel-coupling strength is purely due to the renormalization of the charging-energy gap. In the double-island system, we investigate the transition between weak and strong pumping. Comment: published version, 13 pages, 11 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0903.2709 Zobrazit plný text záznamu View this record from Arxiv