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Ultraquantum turbulence in a quenched homogeneous Bose gas

Lookup NU author(s): Dr George Stagg, Professor Nick ParkerORCiD, Professor Carlo Barenghi

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Abstract

Using the classical field method, we study numerically the characteristics and decay of the turbulent tangle of superfluid vortices which is created in the evolution of a Bose gas from highly nonequilibrium initial conditions. By analyzing the vortex line density, the energy spectrum, and the velocity correlation function, we determine that the turbulence resulting from this effective thermal quench lacks the coherent structures and the Kolmogorov scaling; these properties are typical of both ordinary classical fluids and of superfluid helium when driven by grids or propellers. Instead, thermal quench turbulence has properties akin to a random flow, more similar to another turbulent regime called ultraquantum turbulence, which has been observed in superfluid helium.

Publication metadata

Author(s): Stagg GW, Parker NG, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Physical Review A

Year: 2016

Volume: 94

Issue: 5

Print publication date: 28/11/2016

Online publication date: 28/11/2016

Acceptance date: 28/11/2016

Date deposited: 28/11/2016

ISSN (print): 2469-9926

ISSN (electronic): 2469-9934

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevA.94.053632

DOI: 10.1103/PhysRevA.94.053632

Data Access Statement: http://dx.doi.org/10.17634/101785-3

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