Vortex stretching as a mechanism for quantum kinetic energy decay

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• Bob Kerr (University of Warwick)
• Friday 03 December 2010, 16:00-17:00
• MR2, Centre for Mathematical Sciences, Wilberforce Road, Cambridge.

If you have a question about this talk, please contact Dr C. P. Caulfield.

For a pair of perturbed anti-parallel quantum vortices, kinetic energy $K_{\nabla\psi}$ is converted into interaction energy $E_I$ leading to local kinetic energy depletion that is analogous to energy decay in a classical fluid, even though the governing equations are Hamiltonian and energy conserving. The intermediate stages include: the generation of vortex waves, their deepening, multiple reconnections, the emission of vortex rings and phonons and the creation of a -5/3 kinetic energy spectrum.

This talk is part of the Fluid Mechanics (DAMTP) series.

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