Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-03-16
Phys. Rev. B 79, 235309 (2009)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
published version, 13 pages, 11 figures
Scientific paper
10.1103/PhysRevB.79.235309
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.
Governale Michele
Konig Jurgen
Winkler Nina
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