论文标题
晶格费米子中的量子唤醒
Quantum wakes in lattice fermions
论文作者
论文摘要
在水中的血管后的尾流是移动物体的标志性干扰效果，正如凯尔文勋爵所描述的那样，包含在恒定的通用角度。但是，在其他情况下甚至在晶格系统中，唤醒可能伴随着不同种类的移动障碍。在这里，我们研究了移动干扰对超电原子的费米晶格气体的影响，并分析可能发生的新型唤醒模式的类型。我们展示了如何在半填充时，唤醒角是如何由跳跃能量与干扰速度的比率和相对于晶格方向的运动角度的比例。此外，我们研究了在移动的粒子检测器与移动电位或移动粒子提取器的效果之间留下的差异。我们表明，这些场景在半填充时表现出极大的不同行为，尽管探测器的运动仍然通过“波动唤醒”留下了痕迹，但在理想的检测器消失后，“测量唤醒”。最后，我们讨论了在光学晶格中观察超低效率原子中预测的实验要求。
The wake following a vessel in water is a signature interference effect of moving bodies, and, as described by Lord Kelvin, is contained within a constant universal angle. However, wakes may accompany different kinds of moving disturbances in other situations and even in lattice systems. Here, we investigate the effect of moving disturbances on a Fermi lattice gas of ultracold atoms and analyze the novel types of wake patterns that may occur. We show how at half-filling, the wake angles are dominated by the ratio of the hopping energy to the velocity of the disturbance and on the angle of motion relative to the lattice direction. Moreover, we study the difference between wakes left behind a moving particle detector versus that of a moving potential or a moving particle extractor. We show that these scenarios exhibit dramatically different behavior at half-filling, with the "measurement wake" following an idealized detector vanishing, though the motion of the detector does still leaves a trace through a "fluctuation wake." Finally, we discuss the experimental requirements to observe our predictions in ultracold fermionic atoms in optical lattices.
