论文标题
制作（暗物质）波：多流式暗物质的无缠绕波干扰
Making (dark matter) waves: Untangling wave interference for multi-streaming dark matter
论文作者
论文摘要
可以在单个半经典波函数中捕获无碰撞冷暗物质的经典动力学，通常由流体变量或相位空间分布描述。我们说明了经典多流如何在与Zel'Dovich近似动力学相对应的玩具模型中产生波浪干扰，并将其链接到衍射光学器件。波浪干扰将古典深色物质的古典骨架带有通用特征，类似于小波（或模糊）暗物质的物理烙印。我们通过以积分形式编写波函数来解开这一波的干扰，以获得与经典流体流相对应的单流波效应。我们的波分解捕获了全相位空间信息，并隔离了与涡度和速度分散相关的多流现象。我们将系统的波动干扰特征与衍射灾难积分的标准形式联系起来，这些衍射灾难积分在类似于冷暗物质密度场类似的光场中产生明亮的腐蚀性。我们对暗物质波场的两个互补描述提出了丰富的通用特征，可以解锁宇宙网络尺度上的新方法来建模和探测波浪状的暗物质。
The classical dynamics of collisionless cold dark matter, commonly described by fluid variables or a phase-space distribution, can be captured in a single semiclassical wavefunction. We illustrate how classical multi-streaming creates wave interference in a toy model corresponding to the dynamics of the Zel'dovich approximation and link it to diffraction optics. Wave interference dresses the classical skeleton of cold dark matter with universal features akin to the physical imprints of wavelike (or fuzzy) dark matter. We untangle this wave interference to obtain single-stream wavefunctions corresponding to the classical fluid streams, by writing the wavefunction in an integral form. Our wave decomposition captures the full phase-space information and isolates the multi-stream phenomena related to vorticity and velocity dispersion. We link the wave interference features of our system to the standard forms of diffraction catastrophe integrals, which produce bright caustics in optical fields analogous to the cold dark matter density field. Our two complementary descriptions of dark matter wave-fields present rich universal features that can unlock new ways of modelling and probing wavelike dark matter on the scales of the cosmic web.
