Quantum wakes in lattice fermions
Quantum wakes in lattice fermions
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DOI：
10.1103/physrevresearch.3.033112
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发表时间：
2020-06
影响因子：
4.2
通讯作者：
Matthew Wampler;P. Schauss;E. B. Kolomeisky;I. Klich
中科院分区：
文献类型：
--
作者：
Matthew Wampler;P. Schauss;E. B. Kolomeisky;I. Klich
在水中跟随船只的尾流是运动物体的一种标志性干扰效应，并且如开尔文勋爵所描述的，包含在恒定的万向角内。然而，在其他情况下，甚至在格子系统中，尾流可能伴随着不同类型的运动扰动。在这里，我们调查的超冷原子的费米晶格气体上的移动扰动的效果，并分析可能发生的新类型的尾流图案。我们展示了如何在半填充，尾流角占主导地位的跳跃能量的扰动速度的比率和相对于晶格方向的运动的角度。此外，我们研究了运动粒子探测器与运动势或运动粒子提取器留下的尾流之间的差异。我们表明，这些情况下表现出显着不同的行为在半填充，与“测量尾流”以下的理想化的检测器消失，虽然检测器的运动仍然留下了痕迹，通过“波动尾流。最后，我们讨论了在光学晶格中的超冷费米原子中观察我们的预测的实验要求。
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.