Event

Nov 29, 2018 3:45 pm - Nielsen Hall 170 - Colloquium
Brian Anderson - Arizona
Quantum Turbulence in Flatland

Atomic-gas Bose-Einstein condensates (BECs) enable unique opportunities for studying phenomena that bridge classical and quantum mechanical domains, such as the complex flows found in turbulence. Turbulence in classical fluids is especially challenging to study and visualize; however, quantum turbulence in a superfluid BEC may be characterized by the dynamics of quantized vortices, each one like the core of a microscopic tornado.  In two-dimensional quantum turbulence (2DQT), which can occur in flattened superfluid droplets, vortices behave like fluid-free points that move about in a disordered manner, yet their dynamics represent the turbulent state of the entire fluid.  The vortices can be generated, manipulated, and optically detected with laser light, giving the experimenter unprecedented control and access to turbulence and vortex physics.    Furthermore, theoretical methods provide testable predictions of 2DQT and vortex dynamics, linking this portion of the big turbulence puzzle to a firm quantum mechanical foundation.  In this talk, I will present overviews of turbulence, two-dimensional turbulence, and quantized vortices, followed by recent experimental and theoretical research involving vortices and 2DQT in BECs.  I will address laboratory studies, new experimental techniques, numerical and theoretical progress, and future avenues of investigation that may give new insight into complex fluid phenomena.