论文标题
使用驱动量子点的几何能传输和制冷
Geometric energy transport and refrigeration with driven quantum dots
论文作者
论文摘要
我们在缓慢驱动的单层量子点中研究了几何能传输，该点量弱耦合到电子接触并具有强烈的现场相互作用，这可以是令人反感的或吸引人的。利用最近发现的费米子二元性为主方程的演化运算符，我们为任何一对驱动参数提供了紧凑而有见地的能量泵送曲率的分析表达式。这使我们能够系统地识别并解释不同驾驶方案的泵送机制，从而比较能量和电荷泵。我们确定了多体相互作用的具体影响，并显示了粒子孔对称性和费米子双重性如何单独和组合表现为能量泵浦曲率的系统参数对称性。在此运输分析的基础上，我们研究了充当热泵或冰箱的驱动点，我们发现现场相互作用的迹象在这些热机的性能中起着至关重要的作用。
We study geometric energy transport in a slowly driven single-level quantum dot weakly coupled to electronic contacts and with strong onsite interaction, which can be either repulsive or attractive. Exploiting a recently discovered fermionic duality for the evolution operator of the master equation, we provide compact and insightful analytic expressions of energy pumping curvatures for any pair of driving parameters. This enables us to systematically identify and explain the pumping mechanisms for different driving schemes, thereby also comparing energy and charge pumping. We determine the concrete impact of many-body interactions and show how particle-hole symmetry and fermionic duality manifest, both individually and in combination, as system-parameter symmetries of the energy pumping curvatures. Building on this transport analysis, we study the driven dot acting as a heat pump or refrigerator, where we find that the sign of the onsite interaction plays a crucial role in the performance of these thermal machines.
