English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

We investigate the stability and critical velocity of a weakly interactingBose gas flowing in a random potential. By applying the Bogoliubov theory to adisordered Bose system with a steady flow, the condensate density and thesuperfluid density are determined as functions of the disorder strength, flowvelocity, and temperature. The critical velocity, at which the steady flowbecomes unstable, is calculated from the spectrum of hydrodynamic excitation.We also show that in two dimensions the critical velocity strongly depends onthe system size.

Bogoliubov Theory for a Superfluid Bose Gas Flowing in a Random Potential: Stability and Critical Velocity