Dispersive bottleneck delaying thermalization of turbulent Bose-Einstein Condensates
Fluid Dynamics
2015-05-19 v3 Quantum Gases
Abstract
A new mechanism of thermalization involving a direct energy cascade is obtained in the truncated Gross-Pitaevskii dynamics. A long transient with partial thermalization at small-scales is observed before the system reaches equilibrium. Vortices are found to disappear as a prelude to final thermalization. A bottleneck that produces spontaneous effective self-truncation and delays thermalization is characterized when large dispersive effects are present at the truncation wavenumber. Order of magnitude estimates indicate that self-truncation takes place in turbulent Bose-Einstein condensates. This effect should also be present in classical hydrodynamics and models of turbulence.
Keywords
Cite
@article{arxiv.1007.4441,
title = {Dispersive bottleneck delaying thermalization of turbulent Bose-Einstein Condensates},
author = {Giorgio Krstulovic and Marc Brachet},
journal= {arXiv preprint arXiv:1007.4441},
year = {2015}
}