Leadbeater M, Winiecki T, Samuels D C, Barenghi C F, Adams C S
Department of Physics, University of Durham, United Kingdom.
Phys Rev Lett. 2001 Feb 19;86(8):1410-3. doi: 10.1103/PhysRevLett.86.1410.
By performing numerical simulations based on the Gross-Pitaevskii equation, we make direct quantitative measurements of the sound energy released due to superfluid vortex reconnections. We show that the energy radiated expressed in terms of the loss of vortex line length is a simple function of the reconnection angle. In addition, we study the temporal and spatial distribution of the radiation and show that energy is emitted in the form of a sound pulse with a wavelength of a few healing lengths.
通过基于格罗斯 - 皮塔耶夫斯基方程进行数值模拟，我们对超流涡旋重连所释放的声能进行了直接定量测量。我们表明，以涡旋线长度损失表示的辐射能量是重连角度的简单函数。此外，我们研究了辐射的时间和空间分布，并表明能量以波长为几个愈合长度的声脉冲形式发射。
