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PIRSA:14050139

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https://pirsa.org/14050139

A mechanism for vortex annihilation in two dimensional superfluid turbulence

Lucas, A. (2014). A mechanism for vortex annihilation in two dimensional superfluid turbulence. Perimeter Institute for Theoretical Physics. https://pirsa.org/14050139

Andrew Lucas University of Colorado Boulder

Talk numberPIRSA:14050139
DOI10.48660/14050139
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Recent numerical simulations [1] have suggested that two dimensional superfluid turbulence is characterized by a direct cascade of energy to small length scales, in contrast to the inverse cascade of normal fluids, where energy is transported to large length scales. This direct cascade is characterized by many vortex-antivortex annihilation events. Recent experimental work [2] on Bose-Einstein condensates appears to demonstrate qualitatively similar physics. I will discuss recent work in progress towards identifying the physical mechanism underlying this direct cascade, using techniques of effective field theory.