论文标题
原子蒸气中的涡旋创造，歼灭和非线性动力学
Vortex creation, annihilation and nonlinear dynamics in atomic vapors
论文作者
论文摘要
我们利用新技术来产生涡旋并控制非线性原子蒸气中光束中的相互作用。对涡旋位置的精确控制使我们能够观察到强烈的相互作用，从而导致涉及歼灭的涡流动态。通过这种改进的受控非线性系统，我们比以前的实验更接近纯流体动力学制度，而波前传感器可以直接访问流体的密度和速度。最后，我们开发了一种相对相移方法，该方法模拟了时间演化过程而不改变非线性参数。这些观察是朝着2D湍流状态实施实验的重要一步
We exploit new techniques for generating vortices and controlling their interactions in an optical beam in a nonlinear atomic vapor. A precise control of the vortex positions allows us to observe strong interactions leading to vortex dynamics involving annihilations. With this improved controlled nonlinear system, we get closer to the pure hydrodynamic regime than in previous experiments while a wavefront sensor offers us a direct access to the fluid's density and velocity. Finally, we developed a relative phase shift method which mimics a time evolution process without changing non-linear parameters. These observations are an important step toward the experimental implementation of 2D turbulent state
