Energy relaxation in the Gross-Pitaevskii equation

Details Energy relaxation in the Gross-Pitaevskii equation Energy relaxation in the Gross-Pitaevskii equation

2010-07-30

arxiv.org/abs/1007.5453v1

Physics

Condensed Matter

Quantum Gases

4 pages, 3 figures

Scientific paper

We introduce a dissipation term in the Gross-Pitaevskii equation that describes the stimulated relaxation of condensed bosons due to scattering with a different type of particles. This situation applies to Bose-Einstein condensates of quasi-particles in the solid state, such as magnons and excitons. Our model is compatible with the phenomenology of superfluidity: supercurrents are stable up to a critical speed and decay when they are faster.

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