Bastian Hiltscher, Michele Governale, Jürgen König
Published 2009-08-31, updated 2010-02-02Version 2
In order to investigate the effects of interference and interaction in adiabatic pumping, we consider an Aharonov-Bohm (AB) interferometer with a quantum dot embedded either in one or in both arms. We employ a real-time formalism and we perform an expansion both in the tunnel-coupling strengths between dot and leads and in the pumping frequency, taking into account the Coulomb interaction non perturbatively. We find that pumping in a single-dot AB interferometer has a peristaltic but phase-coherent character. In a double-dot AB interferometer, we find a pumping mechanism that relies purely on quantum mechanical interference and has no classical counterpart.
Comments: 8 pages, 5 figures, updated version as published
Journal: Phys. Rev. B 81, 085302 (2010)
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