论文标题
在被困的原子bose-Einstein冷凝物中葡萄嫩湍流的动量分布
Momentum distribution of Vinen turbulence in trapped atomic Bose-Einstein condensates
论文作者
论文摘要
捕获的Bose-Einstein冷凝物中多料涡流的衰变可能导致涡流状态伴随湍流状态，其特征是没有大规模流动和不可压缩的动能能量谱$ e \ propto k^{ - 1} $。在这项工作中，我们从数值上研究了三维谐波捕获的玻色 - 因斯坦冷凝物的动力学，这是通过两种双重涡旋的腐烂而激发的湍流状态的动力学。首先，我们研究动量分布，并观察幂律行为的出现$ n（k）\ propto k^{ - 3} $与波湍流的共存一致。我们还研究了动能和粒子通量，这使我们能够识别与湍流阶段相关的直接粒子级联。
The decay of multicharged vortices in trapped Bose-Einstein condensates may lead to a disordered vortex state consistent with the Vinen regime of turbulence, characterized by an absence of large-scale flow and an incompressible kinetic energy spectrum $E\propto k^{-1}$. In this work, we study numerically the dynamics of a three-dimensional harmonically trapped Bose-Einstein condensate excited to a Vinen regime of turbulence through the decay of two doubly-charged vortices. First, we study the momentum distribution and observe the emergence of a power-law behavior $n(k)\propto k^{-3}$ consistent with the coexistence of wave turbulence. We also study the kinetic energy and particle fluxes, which allows us to identify a direct particle cascade associated with the turbulent stage.
