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Lookup NU author(s): Dr George Stagg,
Dr Luca Galantucci,
Dr Andrew Baggaley,
Dr Nick Parker
This is the authors' accepted manuscript of a letter published in its final definitive form in 2018. For re-use rights please refer to the publishers terms and conditions.
We study the elementary characteristics of turbulence in a quantum ferrofluid through the context of a dipolar Bose gas condensing from a highly nonequilibrium thermal state. Our simulations reveal that the dipolar interactions drive the emergence of polarized turbulence and density corrugations. The superfluid vortex lines and density fluctuations adopt a columnar or stratified configuration, depending on the sign of the dipolar interactions, with the vortices tending to form in the low-density regions to minimize kinetic energy. When the interactions are dominantly dipolar, the decay of the vortex line length is enhanced, closely following a t−3/2 behavior. This system poses exciting prospects for realizing stratified quantum turbulence and new levels of generating and controlling turbulence using magnetic fields.
Author(s): Bland T, Stagg GW, Galantucci L, Baggaley AW, Parker NG
Publication type: Letter
Publication status: Published
Journal: Physical Review Letters
Print publication date: 25/10/2018
Online publication date: 25/10/2018
Acceptance date: 10/10/2018
ISSN (print): 0031-9007
ISSN (electronic): 1079-7114