The Coulomb drag effect has been observed as a tiny current induced by both electron-hole asymmetry and interactions in normal coupled quantum dot devices. In the present work we show that the effect can be boosted by replacing one of the normal electrodes by a superconducting one. Moreover, we show that at low temperatures and for sufficiently strong coupling to the superconducting lead, the Coulomb drag is dominated by Andreev processes, is robust against details of the system parameters and can be controlled with a single gate voltage. This mechanism can be distinguished from single-particle contributions by a sign inversion of the drag current.

中文翻译：

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Andreev-Coulomb拖曳耦合量子点

已观察到库仑拖曳效应是由正常耦合量子点器件中的电子-空穴不对称性和相互作用引起的微小电流。在目前的工作中，我们表明可以通过用超导电极替换其中一个正常电极来增强效果。此外，我们表明，在低温下以及对于与超导引线的足够牢固的耦合，库仑阻力受安德烈耶夫（Andreev）工艺控制，对系统参数的细节具有鲁棒性，并且可以通过单个栅极电压进行控制。通过阻力电流的符号反转，可以将这种机制与单粒子贡献区分开。