Quantum pump in an Aharonov-Bohm interferometer with a quantum dot driven by an ac field H. Pan, H.-Z. Xu and R. Lü Eur. Phys. J. B, 78 4 (2010) 475-479 Published online: 10 December 2010 DOI: 10.1140/epjb/e2010-10644-4