Schiegg Christian H, Dzierzawa Michael, Eckern Ulrich
Institute of Physics, University of Augsburg, 86159 Augsburg, Germany.
J Phys Condens Matter. 2017 Mar 1;29(8):085303. doi: 10.1088/1361-648X/aa5140. Epub 2017 Jan 17.
We consider two modifications of a recently proposed three-terminal quantum dot heat engine. First, we investigate the necessity of the thermalization assumption, namely that electrons are always thermalized by inelastic processes when traveling across the cavity where the heat is supplied. Second, we analyze various arrangements of tunneling-coupled quantum dots in order to implement a transmission function that is superior to the Lorentzian transmission function of a single quantum dot. We show that the maximum power of the heat engine can be improved by about a factor of two, even for a small number of dots, by choosing an optimal structure.
我们考虑了对最近提出的三端量子点热机的两种改进。第一，我们研究了热化假设的必要性，即电子在穿过提供热量的腔时总是通过非弹性过程热化。第二，我们分析了隧穿耦合量子点的各种排列，以实现一种优于单量子点洛伦兹传输函数的传输函数。我们表明，通过选择最优结构，即使对于少量量子点，热机的最大功率也可以提高约两倍。
