论文标题
Thomas-Fermi制度中的Feshbach引擎
A Feshbach engine in the Thomas-Fermi regime
论文作者
论文摘要
Bose-Einstein冷凝物可通过借助Feshbach共振来调整颗粒间相互作用的强度来产生工作。在不均匀的电位中，这些相互作用坡道改变了被困的气体的体积，从而使人们创建一个被称为Feshbach发动机的热力学循环。但是，为了获得大型功率输出，必须在短时间内执行发动机笔触，这与如果以非绝热方式完成笔触，则发动机的效率通过不可逆转的工作降低了这一事实。在这里，我们调查了如何在托马斯 - 弗米（Thomas-Fermi）制度中运行这种引擎，并提出了绝热性的快捷方式，以最大程度地减少不可逆的工作并允许有效的发动机操作。
Bose-Einstein condensates can be used to produce work by tuning the strength of the interparticle interactions with the help of Feshbach resonances. In inhomogeneous potentials, these interaction ramps change the volume of the trapped gas allowing one to create a thermodynamic cycle known as the Feshbach engine. However, in order to obtain a large power output, the engine strokes must be performed on a short timescale, which is in contrast with the fact that the efficiency of the engine is reduced by irreversible work if the strokes are done in a non-adiabatic fashion. Here we investigate how such an engine can be run in the Thomas-Fermi regime and present a shortcut to adiabaticity that minimizes the irreversible work and allows for efficient engine operation.
