Interference and interaction effects in adiabatic pumping through quantum dots

Details Interference and interaction effects in adiabatic pumping through quantum dots Interference and interaction effects in adiabatic pumping through quantum dots

2009-08-31

arxiv.org/abs/0908.4542v2

Phys. Rev. B 81, 085302 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 5 figures, updated version as published

Scientific paper

10.1103/PhysRevB.81.085302

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.

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