Figure 4: Current map.
From: Harvesting dissipated energy with a mesoscopic ratchet
(a) Colour plot of the current measured in the cold line as a function of the first QPC transmission Dc,1 (x axis) and the second one Dc,2 (y axis). The applied bias on the hot line is equal to 2 mV. The first QPC of the hot line is tuned on the first plateau, although the series QPC is opened. When the symmetry of the barriers is inverted the sign of the current changes. (b) Expected current as a function of both Dc,1 and Dc,2 for Ceff~0.4 pF. We recover experimental features, as a zero current along the line Dc,1=Dc,2, and a reverse current when the symmetry of the barriers is changed.
