Wave interference gives rise to order unity density fluctuations on de Broglie scale in halos. One manifestation is vortices where the density vanishes and around which the velocity circulates. There is one vortex ring per de Broglie volume on average.

For sufficiently low masses, soliton condensation occurs at centers of halos. The soliton oscillates and undergoes random walks, which is another manifestation of wave interference. The halo and subhalo abundance is expected to be suppressed at small masses, but the precise prediction from numerical wave simulations remains to be determined.

For ultralight ∼10⁻²² eV dark matter, the wave interference substructures can be probed by tidal streams or gravitational lensing. The signal can be distinguished from that due to subhalos by the dependence on stream orbital radius or image separation.

Axion detection experiments are sensitive to interference substructures for wave dark matter that is moderately light. The stochastic nature of the waves affects the interpretation of experimental constraints and motivates the measurement of correlation functions.

波干涉在光晕中引起德布罗意尺度上的有序单位密度波动。一种表现形式是密度消失且速度在其周围循环的涡流。每个德布罗意体积平均有一个涡环。

对于足够低的质量，孤子凝聚发生在晕的中心。孤子振荡并进行随机游走，这是波干涉的另一种表现形式。晕和亚晕的丰度预计在小质量时会受到抑制，但数值波模拟的精确预测仍有待确定。

对于超轻~10 ^-22 eV 暗物质，波干涉子结构可以通过潮汐流或引力透镜探测。通过依赖于流轨道半径或图像分离，可以将信号与由亚晕引起的信号区分开来。

轴子探测实验对中等亮度的波暗物质的干涉子结构敏感。波的随机性影响实验约束的解释并激发相关函数的测量。